fertility 1

Fertility- Before you go any further, you are forgetting one thing…….. The Male

In this video blog I explains how I often get emails from patients and practitioners, needing assistance with fertility issues. The only thing is, it is often only from the female perspective and I have to then explain this to people, or these practitioners. So often, as I am hearing their case study, or patients telling their story, I have to politely stop them and explain “Fertility Before you go any further, I can see what the issue is, you are forgetting one thing…… The Male”

Being completely honest, 95% of the time it is the full female history I am hearing and absolutely no mention of the male. The male is always 50% of the fertility picture, unless there is absolute infertility with the female (medically diagnosed infertility)

Fertility issues require proper evaluation of both the male and female, otherwise crucial things get overlooked. It takes a sperm and an egg to make a baby, not just an egg. Besides that it is a legal and ethical requirement to investigate the female and male. You cannot just investigate and treat the female. Have a listen to the latest video (below) of this very important subject.

If you do need assistance with fertility and reproductive issues, please give my staff a call and find out how my fertility program may be able to assist you and your partner.

Regards

Andrew Orr

-No Stone Left Unturned

-Master of Reproductive Medicine

-The International Fertility Experts

 

Untitled design 9

8 Tips To Increase The Chances Of a Successful Pregnancy

More and more couples are now struggling to fall pregnant. The causes of this can be varied and this is why proper investigations and seeing a fertility expert is important. But, there are things couples can do to increase there chances of having a baby. Here are my 8 tips to increase the chances of a successful pregnancy.

Reduce stress

One of the  biggest cause of fertility issues and cycles not working is stress. This includes being busy all the time too. Stress  and being on the go all the time, increases cortisol and adrenalin and these can affect your hormones.  Stress can also interfere with blood circulation into the uterine environment, which can then affect implantation. We know that in animals, stressed animals do not conceive during time of stress. The same goes for humans.

It takes two people to have a baby

Biology 101 tells us that it takes a man and a woman to have a baby, meaning it takes a sperm and an egg. Unless you are a single woman, or a same sex female couple, using donor sperm, the man needs to be make sure his sperm is healthy and checked out properly too. Over 50% of fertility issues are related to male factors and up to 85% of miscarriage issues can be related to chromosomal and DNA factors relating to to sperm.

Sperm quality also changes by as much as 20% in each month so it is just as important for a male to continue on supplements etc to keep his sperm healthy. Men often bury their heads in the sand when it comes to fertility issues and we need them to be more proactive and not just leave it to the woman to do all the work and take all the burden on. There will always be a bit on each side when it comes to fertility, so men need to get their act together and support their partner and support the process more.

Seeking the right advice and proper investigations

All too often couples wait too long to seek advice and treatment for fertility issues. Early intervention, investigations and management is the key to any issue we face on a health perspective. The wait and see approach isn’t always the best advice that is given to couples. You also need to see the right healthcare professionals too. Fertility evaluation needs to be done for both the woman and the man, not just the woman. This is why it is important to see a fertility expert if you are having trouble falling pregnant.

Getting a second opinion

If someone asked you how many quotes would you get to renovate your house etc, how many quotes would you get?

Most people will say about 3-5 quotes, yet when it comes to their health, or fertility issues, they are only seeking 1, possibly 2 quotes, which means they place more importance on their houses etc. If something or someone isn’t helping you, then it is so important to get a second opinion. Just because someone is nice, or has all your health history, does not mean they are worth staying with, especially if they aren’t helping you fall pregnant. A second opinion, or even a third, fourth, or fifth, could just be what is needed to get you the right advice and see someone who is more suitable to helping you. Things do get missed and something I see daily, so please never underestimate the power of another opinion.

Eat more protein and Essential Fats

Protein and essential fats are the essential building blocks for life. They are also the building blocks for making your hormones and making healthy eggs and sperm. Increased protein also helps prevent ovarian hyper-stimulation and also dampens down inflammatory response caused by over eating highly refined sugars and refined carbohydrates.

Increase your Electrolytes

Water alone will not stop you from dehydrating. Electrolytes are a very important part of the body chemistry and hormone therapy, certain drugs and medications drastically reduce them. It is important to keep the cells body hydrated at all times and especially during an IVF cycle and during pregnancy. Electrolytes consumption during IVF cycles also helps prevent ovarian hyper-stimulation.

Regular climax

Regular climax, self induced, or with a partner, (also before and especially after embryo transfer) assists with implantation and health blood supply to the uterus. An embryo feeds off blood supply from the uterus and regular climax helps optimise this blood flow and with increasing hormones such as oxytocin. Without a healthy blood supply to the uterus and circulating hormones the embryo will die.

Regular sex also helps with men as well, by improving sperm quality. Storing it up does not help sperm quality and actually makes it worse. Lastly regular sex and climax also helps with a healthy relationship and bonding as a couple.

Not having enough sex and not at the right time

One of the biggest myths is that all women ovulate around day 14, or in the supposed fertile window between day 10 and day 17. A landmark study published in the British Medical journal showed that more than 70% of women were ovulating before day 10 and after day 17 of their cycle and there was actually only a 10% probability of being fertile in the supposed fertile window (day 10 to day 17). Couples need to be having regular sex, at least every second day, from the time the menses finish right up until the woman is due for her menses again.

An egg dies 24 hours after it is release so if there is no sperm there, then the egg cannot be fertilised and the egg dies. That is the facts. And no… sperm do not last up to seven days etc. Most of the three to five hundred million sperm that set off are dead after an hour. Less than 20 sperm actually make the journey to the fallopian tubes and even less make the journey to meet the egg.

Getting the right help

If you are having trouble conceiving, then give my friendly staff a call and find out more about how my fertility program may be able to assist you. For more information, please call +61 0738328369 or email info@drandreworr.com.au

Regards

Andrew Orr

-No Stone Left Unturned

-Master of Reproductive Medicine

-The International Fertility Experts

Untitled design 16

Lycopene Helps Improve Sperm Quality

A new research study conducted by the university of Sheffield has shown that supplementation of Lycopene, a compound found in cooked tomatoes, has helped improve the sperm quality in a group of men.

Many studies have examined the role of dietary factors, antioxidants and amino acids and data from randomized controlled trials suggest that antioxidant therapy can improve sperm quality.

Health benefits of lycopene supplementation have been proposed for a variety of health conditions. This recent study examines whether 14mg of daily lycopene supplementation, for 12 weeks, can help improve sperm motility and sperm morphology in men.

Poor sperm quality

Poor sperm quality is a major contributor to infertility in heterosexual couples, but men are often overlooked and often are unwilling participants in the journey to have a baby. There is no doubt that sperm quality is declining and many couples inability to have a baby is actually coming from the male side of things, not the female side.

It is generally recognized that 50% of fertility issues are related to male sub-fertility and poor quality sperm. Typically, fertility problems in the male manifest themselves as ejaculates containing too few sperm (oligozoospermia), or sperm that swim poorly (asthenozoospermia), or sperm with poor size and shape (teratozoospermia) or a combination of all three.

Factors Affects Sperm Quality

Known factors that affect sperm are – Poor diet, obesity, alcohol, smoking, recreational drugs, steroids, medications, chemicals and environmental factors. There are also genetic and hereditary issues that affect sperm as well.

Women are often driving force behind fertility health

Women are often the ones being very proactive in whatever it takes to have a baby and will take supplements, improve their diet, and look at any way they can to help with conceiving. Unfortunately, getting men to do the same can be like pulling teeth and we need to start educating men of the importance of preconception care prior to having a baby.

Men offered very little advice about sperm health

Unfortunately many fertility clinics and healthcare practitioners in general, are giving very little advice and information around what men can do to improve their sperm. Many healthcare professionals are also only focussing on delivering general advice to highlight the known lifestyle risks for poor sperm quality. More advice around preconception care is needed.

Preconception care for men is a must

There is now lots of research about the importance of preconception care for men and lots of research on the importance of a healthy diet, lifestyle changes and the role of antioxidants and amino acids for sperm health and sperm quality.

This recent study could add to the ways that men can improve their sperm quality and help with the outlook for men with known sperm issues. This recent study could also add to existing research and could also lead to better ways to reduce the damaging impact of modern living on reproductive health. We really do need for all couples to know, that of all infertility cases, at least 50 per cent of the issue is due to male factors and poor quality sperm.

Lycopene increases sperm quality

This is the first ever double-blind randomised controlled trial to assess the impact of giving men a bio-enhanced form of lycopene (called LactoLycopene) to see if it helped with sperm quality. The team from the university of Sheffield discovered that the lycopene supplementation made no significant difference to sperm count and concentrations. However the rapid progressive motile sperm and the sperm with normal morphology increase by around 40% in response to the lactolycopene intervention. Rapid progressive sperm and morphology are the two most important parameters for sperm quality and for increasing chances of fertilisation and pregnancy.

During the 12-week trial half the recipients took LactoLycopene supplements and the other half took identical placebo (dummy pills) every day for 12 weeks. Neither the researchers nor the volunteers knew who was receiving the LactoLycopene treatment and who was receiving the placebo. Sperm and blood samples were collected at the beginning and end of the trial. The researchers were surprised by the improvement in the sperm quality shown by the results. The improvement in morphology and rapid progressive sperm was dramatic after lycopene supplementation.

What are Lycopenes?

Lycopene can be found in some fruits and vegetables, but the main source in the diet is from tomatoes. However, the bioavailability of lycopene from fresh tomatoes is low, but this is enhanced by a special natural processing technique of heating and infusing tomatoes with oil. As such, this study used lactolycopene, the main ingredient of which lycopene is embedded in a special protein mix for enhanced intestinal absorption.

This was the first properly designed and controlled study of the effect of LactoLycopene on semen quality, and it has spurred researchers to want to do more research into lycopene and well as other antioxidants and amino acids that may help with sperm quality. The research also shows the role these antioxidants play in helping inhibit the damaging effects of oxidation and oxidative stress.

Oxidation and Oxidative Stress Damage Sperm

Oxidation and oxidative stress is a known cause of damage to sperm and the sperm DNA. Lycopene is a powerful antioxidant that is potentially inhibiting oxidation and the damage of oxidative stress causes to sperm quality. Researchers believe this antioxidant is the key to improvements in sperm quality seen in this trial and could be an answer to the cause of many male fertility problems. More research is needed and the research team is hoping to embark on a new study as soon as possible.

Final Word

As part of my fertility program all males are educated on the importance of preconception care and about optimum sperm health. All men on my fertility program are given antioxidants and supplements that have been shown to assist with sperm quality and maintain optimum sperm health. Men are 50% of the equation of making a baby and why all men need to be included in any preconception care and any program to assist couples in having a baby.

Regards

Andrew Orr

-No Stone Left Unturned

-Master of Reproductive Medicine

-The International Fertility Experts

 

Journal Reference:

  1. Elizabeth A. Williams, Madeleine Parker, Aisling Robinson, Sophie Pitt, Allan A. Pacey. A randomized placebo-controlled trial to investigate the effect of lactolycopene on semen quality in healthy malesEuropean Journal of Nutrition, 2019; DOI: 1007/s00394-019-02091-5
weight loss 2036966 1920

Being Overweight, or Underweight, Can Adversely Affect Fertility

As mentioned in previous posts about fertility and weight, it is important to have healthy weight and waist size when trying to conceive. It is important to address dietary and lifestyle issues in order to be in health weight and waist range before trying to conceive.

Healthy Waist Size

Healthy waist range for a woman is 80cm (from the belly button around)

Healthy waist range for a man is 94cm (from the belly button around)

If a woman’s waist size is about 88cm and a man’s waist size if above 102cm then they are in what we call “metabolic syndrome”

This increases their chances of diabetes, heart disease, depression, gynaecological conditions (PCOS, endometriosis etc), sperm issues, egg quality issues, reproductive issues, increased miscarriage, increased risk of certain cancers and of course…. infertility.

Body fat and how it affects fertility

Excess body fat (now known as obestrogens) can disrupt hormones and fertility and can have a negative effect on egg and sperm quality.

Similarly being underweight and low body fat can affect fertility outcomes too. Body fat has a regulatory role in reproduction and a moderate loss of fat, from 10% to 15% below normal weight for height, may delay the menstrual cycle, completely stop the menses altogether and inhibit ovulation. Both dieting and excessive exercise can reduce body fat below the minimum amount and lead to infertility. But this is reversible with weight gain, increased body fat and reduction of intensive exercise, or both.

A moderate reduction in body fat, not just weight, for those overweight, can increase fertility and chances of pregnancy exponentially. Similarly an increase in body fat for those that are underweight, and who don’t have enough body fat, can increase their fertility and chances of pregnancy as well.

This goes for men too. Increased body fat, or not enough body fat can affect hormone production and fertility and can affect sperm quality and sperm production.

This is why preconception care and healthy screening and weight and waist management is so important before trying to conceive. This should also be a part of any fertility program and is definitely part of my fertility program for all couples.

Are you in healthy waist range?

Regards

Dr Andrew Orr

-No Stone Left Unturned

-Master of Reproductive Medicine and Women’s Health Medicine

-Women’s and Men’s Health Advocate

01 Dr Andrew Orr 1

Cartoon sperm

Sperm Quality and How To Took After It

More often than not, women are often told that is their egg quality, or some gyneacological factor is the cause of not being able to conceive. But, in truth, more often than not, it is actually the sperm quality that is at fault, or in combination. Fertility issues are not just a woman’s cross to bare.

Men are 50% of the fertility equation and up to 85% of miscarriage issues can be related to chromosomal and DNA factors relating to poor quality sperm in men.

To be honest, men often think that they have this inherent right to conceive and often believe there is nothing wrong with their sperm, despite never being tested. Many often avoid being tested and will often make great claims as to why they should not be tested either.

As part of proper fertility assessment, both the man and the woman need to be evaluated, not just the female.
A man will need to have a comprehensive semen analysis done and may also need further testing such as DNA fragmentation analysis, or a sperm chromatin assay. There will also be further genetic testing needed as well.

A semen analysis is really on a basic test that lets us know what the sperm look like and if they have 2 heads, 2 tails and may be swimming in circles. The fact is, that many men’s sperm quality is substandard and their sperm is actually not in a good shape at all. Recent research and statistics have shown that the male sperm quality has fallen by as much as 70% in the last 60-70 years.

There are many things that can affects a male sperm quality such as:
1. Steroids and recreational drugs
2. Alcohol
3. Smoking (including recreational drugs)
4. Chemicals
5. Drugs (pharmaceutical and illegal)
6. Being overweight and too much body fat
7. Age

These are to name just a few. There are also genetic and hereditary issues that need to be checked as part of proper fertility evaluation as well.

More often than not these days, men are the bigger part of the issue when it comes to not being able to have a baby. Men are often also overlooked as part of the issue as well, which is actually not good ethical practice.

Many couples are also quick to tell me, or other healthcare practitioners, that the man’s sperm is fine, or they have been told it is fine, when actual fact it is not. OK, or fine for IVF purposes does not mean that the sperm is fine. It is very rare to see a man that is having troubles conceiving a baby with his partner that has sperm that is fine. That is the truth.

If you have been trying to conceive for a long time (and not being able to conceive) and the male has not been checked properly, or on some kind of lifestyle and preconception care plan, then in might be time you looked into that.

If you do need help with preconception care and getting your eggs and sperm more healthy, then enquire about my fertility program that has helped over 12,500 babies into the world and counting.

In the mean time have a look at this great fact sheet about your sperm and how to look after them at yourfertitity.org.au and put together by Andrology Australia.

Take care

Regards

Dr Andrew Orr

-No Stone Left Unturned

-Master of Reproductive Medicine and Women’s Health Medicine

-Women’s and Men’s Health Advocate

01 Dr Andrew Orr 1

IVF cover image

Let’s Talk About Why IVF Cycles Fail

Let’s talk about why IVF cycles fail because it is a very common question that is asked when a cycle fails. Often there will be no conclusive answer and often when I am asked this, I have to say the old saying “How long is piece of string?”

The reason I say this is that there are so many factors involved with a cycle failing. It could be from following

  • poor egg quality
  • poor sperm quality
  • age of the couple
  • genetic factors (diagnosed, or undiagnosed)
  • hereditary issues
  • DNA and chromosomal issues
  • a non-receptive endometrium
  • dietary and lifestyle factors
  • weight factors (excess or too little weight)
  • emotional factors, or mood disorders
  • stress
  • incorrect hormone therapy
  • medications
  • human error
  • lab errors
  • many other factors in the IVF process.

I wish it was as easy as putting a sperm and an egg together and it just happening. I know many couples do look at it this way, but there is so much more to the whole process of conception. I know it is often hard to understand, but no google search is going to tell you all of this and you would need years of study to completely understand the whole process. Plus IVF is still only a young form of medicine and it still evolving.

This is why IVFsuccess rates are still relatively low. We just do not have the technology yet to tell us which embryo will go on to become a baby. If we had that, then there would be a much higher, if not near 100% success rate. The reality is that type of technology may never be available, or would be many many years off. We can only hope.

The other thing I explain to couple is that sometimes it is literally the IVF process hindering a couples chances of success, by not having the right protocol, or right team helping them.  I could go on and on because there are so many factors that could affect a cycle and someones chances of conceiving. This is why I use the term “How long is a piece of string?”

This is why I do what I do and explain all of this and more to all my patients as part of my fertility program. I am literally there to hold their hands every step of the way and explain everything in detail each step of the way as well. I will always make sure everything is done properly and even go into bat for them and step on toes if I have too. My patient’s come first always.

What is required for a successful pregnancy?

At least three things are required for a successful pregnancy during in an vitro fertilization (IVF) cycle:

  • a healthy embryo
  • a receptive endometrium
  • careful transfer at the proper time in the cycle

There are things other things such as the right diet and right nutrients and right emotional state for the couples and proper preconception care, but for now I am just talking about a successful embryo transfer on a medical level. Firstly I will discuss the IVF process.

IVF has improved significantly in its almost 40-year history. Different types of hormone and fertility drugs have been developed that are easier to administer and are associated with an improved safety profile. In addition, numerous stimulation protocols are available that allow us to individually tailor treatments. For example, ultrasound-guided embryo transfer using soft catheters and embryo glue (enzyme to assist implantation) has also helped with ensuring better placement of the embryo, without trauma to the endometrium, but very few clinics are actually doing this. Tests can also be used to evaluate the receptivity of the endometrium in order to determine the best time to schedule the transfer.

Despite all these improvements, however, implantation and pregnancy rates with IVF only slowly increase year after year.

Achieving Implantation-The hardest step

The rate-limiting step of IVF is implantation. It requires the proper interaction of a healthy embryo and a receptive endometrium. It often fails due to problems with the embryos. The genetic health of the embryo depends on both its inherited genetic material and on the errors and repairs during the cell divisions.

A chromosomally abnormal (anuploidy) embryo is unlikely to implant, and when it does it is likely to be lost early on. Many embryos that are transferred have chromosomal abnormalities, even if they look fine on the outside, or are classified as being the best grade prior to transfer. We need people to understand that just because and embryo has reached Blastocyst, or Morella stage and it looks like a good quality embryo from the outside, it does not mean that the inside and the chromosomes inside the embryo are OK. Not every fertilised egg will result in a genetically sound embryo that will go on to become a baby.

DNA & Chromosomal When Sperm and Egg Combine

We also need people to realise that an embryo is made up the genetic material of two people and that requires the sperm to be healthy both outwardly, but also chromosomally, and this can change with each batch of sperm ejaculated. Sperm quality and the viability of sperm changes and just because something was “OK” last cycle, or two years ago, or last month, or last week, does not mean that it is OK now.

Unfortunately people need to face the reality of what happens with the body and reproduction. The health of the sperm is also reflected in the health and lifestyle and age of the male too. Unhealthy males produce unhealthy sperm and higher levels or sperm with chromosomal abnormalities and damage to the DNA. Unless you are testing every batch of sperm for DNA and chromosomal abnormalities, you aren’t going to see this and even then, testing can only see so much.

A healthy embryo (Euploidy embryo) also requires a female to be healthy and her eggs to be health chromosomally and on a DNA level. It also requires a healthy male for his sperm quality to be healthy on a DNA levels as well. Egg and sperm quality is also related to age, diet, lifestyle, environment, and exposure to environmental disruptors, weight, body fat, stress and so many other factors.

We need people to be aware of this. Then when you put two unhealthy people’s genetic and reproductive material together, there is a high likelihood that it will produce higher numbers of abnormal embryos, and sometimes it can be all of them. It all depends on the health of the sperm and health of the eggs at time of fertilisation. Even then we can still have random errors in chromosomes and DNA and this then produces faulty embryos. Again this is a hard process to explain and again Dr Google isn’t going to tell you this.

Pre-implantation Genetic Diagnosis/Screening (PGD/PGS)

Various methods of genetic testing of embryos have been evaluated in past decades. During the early days of PGD/PGD many embryos were lost in this form of screening. Today it is more routine and more perfected.  One can test the chromosome content of the polar bodies, but a cleavage-stage embryo (day 3 of development) or a blastocyst-stage embryo can be evaluated as well. In addition, various techniques  are available for assessing the chromosomes.  There are also new testing and new technologies that have addressed the shortcomings of these earlier tests.

The authors of a recent systematic review concluded that comprehensive genetic screening of embryos using day 5 blastocyst biopsy is associated with increased implantation and pregnancy rates. In addition, this technology appears to be a good tool to limit the number of embryos transferred. But embryos can still be tested early on in their development, with good results, too.

Most experts recommend genetic testing of embryos in women with advanced reproductive age, recurrent implantation failure, recurrent pregnancy loss, or severe male factor infertility/DNA issues. This then gives a greater probability of transferring a chromosomally normal embryo and having a higher chance of implantation and pregnancy occurring. But even a chromosomally normal embryos doesn’t ensure a pregnancy. This is often the hardest thing for people to get their heads around. To be honest, much of this comes down to luck and is really in the hands of the gods. Again this is often not told to people and no google search is going to tell you this either.

Preconception care increases chances of conceiving

But what you can do to ensure healthy egg quality, healthy sperm quality, healthy embryo quality, healthy uterine lining, decreases stress levels, optimal health at time of transfer etc, is doing proper preconception care as part of proper fertility program.  There is now growing evidence that the health of both parents before and at the time of conception influences the chances of conceiving and the short and long term health of the future offspring. (9,10,11,12,13,14,15)

This is why I offer couples a program to go over everything they need to know and everything the need to do prior to trying to conceive or trying to embark on the next IVF cycle. It is about getting the couple as healthy as possible and their bodies as ready as possible to give them the best chances of success. I always explain to people that preparing for an IVF cycle is like preparing for a marathon. If you do the work and get the body ready, it gives you a better chance of making it to the finish line.

If you are having trouble falling pregnant, or are having failed IVF cycle, then give my clinic a call and find out more about how my fertility program may be able to assist you achieving success of having a baby. So far my program has helped over 12,500 plus babies into the world and counting. It doesn’t matter if you are starting the journey, or well on your way into the journey or trying to have a baby. You can also do a meet and greet appointment to find out more about the fertility program before you commit to the whole program.

Take care

Regards

Andrew Orr

-No Stone Left Unturned

-Master of Reproductive Medicine and Women’s Health Medicine

-Women’s and Men’s Health Advocate

01 Dr Andrew Orr 1

References

  1. Mains L, Van Voorhis BJ. Optimizing the technique of embryo transfer. Fertil Steril. 2010;94:785-790. Abstract
  2. Society for Assisted Reproductive Technology. Clinic Summary Report. https://www.sartcorsonline.com/rptCSR_PublicMultYear.aspx?ClinicPKID=0Accessed April 27, 2015.
  3. Staessen C, Platteau P, Van Assche E, et al. Comparison of blastocyst transfer with or without preimplantation genetic diagnosis for aneuploidy screening in couples with advanced maternal age: a prospective randomized controlled trial. Hum Reprod. 2004;19:2849-2858. Abstract
  4. Mastenbroek S, Twisk M, van Echten-Arends J, et al. In vitro fertilization with preimplantation genetic screening. N Engl J Med. 2007;357:9-17. Abstract
  5. Yang Z, Liu J, Collins GS, et al. Selection of single blastocysts for fresh transfer via standard morphology assessment alone and with array CGH for good prognosis IVF patients: results from a randomized pilot study. Mol Cytogenet. 2012;5:24.
  6. Scott RT Jr, Upham KM, Forman EJ, et al. Blastocyst biopsy with comprehensive chromosome screening and fresh embryo transfer significantly increases in vitro fertilization implantation and delivery rates: a randomized controlled trial. Fertil Steril. 2013;100:697-703. Abstract
  7. Forman EJ, Tao X, Ferry KM, et al. Single embryo transfer with comprehensive chromosome screening results in improved ongoing pregnancy rates and decreased miscarriage rates. Hum Reprod. 2012;27:1217-1222. Abstract
  8. Scott RT Jr, Upham KM, Forman EJ, et al. Cleavage-stage biopsy significantly impairs human embryonic implantation potential while blastocyst biopsy does not: a randomized and paired clinical trial. Fertil Steril. 2013;100:624-630. Abstract
  9. Buck Louis, G. M., et al. (2016). Lifestyle and pregnancy loss in a contemporary cohort of women recruited before conception: The LIFE Study. Fertility and Sterility, 106(1), 180-188. doi: 10.1016/j.fertnstert.2016.03.009
  10. Chiu, Y.-H., Chavarro, J. E., & Souter, I. (2018). Diet and female fertility: doctor, what should I eat? Fertility and Sterility, 110(4), 560-569. https://doi.org/10.1016/j.fertnstert.2018.05.027
  11. Day, J., et al. (2016). Influence of paternal preconception exposures on their offspring: through epigenetics to phenotype. American Journal of Stem Cells, 5(1), 11-18
  12. Homan, G. F., Davies, M. J., & Norman, R. J. (2007). The impact of lifestyle factors on reproductive performance in the general population and those undergoing infertility treatment: a review. Human Reproduction Update, 13(3), 209-223.
  13. Nassan, F. L., et al. (2018). Diet and men’s fertility: does diet affect sperm quality? Fertility and Sterility, 110(4), 570-577. https://doi.org/10.1016/j.fertnstert.2018.05.025
  14. Salas-Huetos, A., et al. (2017). Dietary patterns, foods and nutrients in male fertility parameters and fecundability: a systematic review of observational studies. Human Reproduction Update, 23(4), 371-389. doi: 10.1093/humupd/dmx006
  15. Sharma, R., et al. (2013). Lifestyle factors and reproductive health: taking control of your fertility. [Review]. Reprod Biol Endocrinol, 11(66), 1477-7827.