- Conception is much more successful if BOTH female and male
have adequate amount of vitamin D (> 30 ng) - Testosterone levels are proportional to vitamin D levels - up to about 50 ng
- Birth rates doubled with Vitamin D - 300,000 loading dose for men – RCT Nov 2017
- Infertility is higher in groups with low vitamin D - such as people with dark skins
(More Fertility/Sperm info below)
Learn how Vitamin D is essential for good health
Watch a 5 minute video "Does Less Sun Mean more Disease?"
Browse for other Health Problems and D in left column or here
see also Supplementing and More in the menu at the top of every page
If you have a disease associated with low Vit D take Vit D
Raising your Vit D levels will substantially prevent other low-Vit D health problems
Often your specific health problem will also be treated
See also
Overview Women and Vitamin D
Overview Pregnancy and vitamin D Fertility and Vitamin D – several articles
Endometriosis
Ensure a healthy pregnancy and baby - take Vitamin D before conception
Search Vitamin D Life for IVF OR "IN VITRO FERTILIZATION" 345 items as of Sept 2019
Search Vitamin D Life for "Assisted reproduction" 177 items as of Sept 2019
Search Vitamin D Life for "polycystic ovary syndrome" OR PCOS" Sept 2019
Search Vitamin D Life fore Testosterone 77 items just in webpages as of Sept 2020
Search Vitamin D Life for "erectile dysfunction" 120 items as of July 2018
Conception and vitamin D snapshot as of 2012
Vitamin D greatly improves Fertility
- Live birth 1.7 X more likely after IVF if good level of vitamin D – meta-analysis Aug 2020
- If diagnosed infertile, more likely to have live birth if Vitamin D fortification – Feb 2020
- Infertility treatment needs to achieve at least 30 ng of vitamin D – May 2019
- Vitamin D is needed for human fertility – goal is 50 ng – Sept 2018
- Preconception vitamin D is great - every extra 10 ng associated with 10 percent more likely to have live birth – Aug 2018
- In-vitro Fertilization costs at least 10,000 dollars, Vitamin D costs 5 dollars
- Women with more than minimum vitamin D were 3.4 X more likely to achieve pregnancy and 1.6 X more likely to have live births – June 2017
- Assisted Reproduction – 5 studies concluded vitamin D repletion helps – Review March 2015
- Pregnancy success increased 30 percent if sunny (or vitamin D) one month earlier – June 2015
- IVF 4X more successful for white women with lots of vitamin D – Oct 2012 many studies
Increased male Vitamin D increases fertility
- Fertility (sperm) associated with vitamin D – meta-analysis Sept 2019
- Infertility - 71 percent of the time of BOTH partners had less than 20 ng of Vitamin D – Aug 2017
- Birth rates doubled with Vitamin D - 300,000 loading dose for men – RCT Nov 2017
- Male fertility 4 X higher if high Vitamin D – Nov 2015
- Vitamin D somewhat assists reproduction – both the mother and the father – May 2014
- Male fertility is improved in many ways by vitamin D – Jan 2014
Items in both of the categories Intervention AND Fertility/Sperm
- In Vitro Fertilization clinical trial using 50,000 IU of Vitamin D bi-weekly – Dec 2024
- Sperm not improved enough by Vitamin D - 50,000 IU weekly for 8 weeks - RCT Aug 2020
- Women had better sexual desire, orgasm and satisfaction after Vitamin D supplementation – Feb 2018
- Testosterone and erectile function increased after vitamin D supplementation – Jan 2018
- Birth rates doubled with Vitamin D - 300,000 loading dose for men – RCT Nov 2017
- Increased Testosterone and Erectile function, decreased weight with Vitamin D – March 2017
- Assisted Reproduction – 5 studies concluded vitamin D repletion helps – Review March 2015
- wiki page:
- In Vitro Fertilization clinical trial using 50,000 IU of Vitamin D bi-weekly – Dec 2024
- Sperm not improved enough by Vitamin D - 50,000 IU weekly for 8 weeks - RCT Aug 2020
- Live birth 1.7 X more likely after IVF if good level of vitamin D – meta-analysis Aug 2020
- If diagnosed infertile, more likely to have live birth if Vitamin D fortification – Feb 2020
- Boys who were born Small for Gestational age are 1.9X more likely to be infertile – Dec 2019
- Conception within 6 months 3X more likely if high vitamin D – Oct 2019
- Fertility (sperm) associated with vitamin D – meta-analysis Sept 2019
- Poor ovarian response (poor IVF) associated with low vitamin D – Sept 2019
- Vitamin D associated with 60 percent better assisted reproductive success – Dec 2019
- In-vitro Fertilization costs at least 10,000 dollars, Vitamin D costs 5 dollars
- Fertility of men and women reduced by obesity and low vitamin D (perhaps synergistically) – June 2019
- Infertility treatment needs to achieve at least 30 ng of vitamin D – May 2019
- Natural pregnancy 4X more likely if sperm had a lot of CYP24A1 – April 2019
- Infertile women 10 percent more likely to die (perhaps due disease associated with low vitamin D – Nov 2017
- Perhaps vitamin D reduces DNA fragmentation of sperm – 2021
- Sexual disfunction treated by 300,000 IU of Vitamin D – RCT Nov 2018
- The role of vitamin D in male fertility, A focus on the testis – Sept 2017
- Premature ejaculation associated with low vitamin D – 2018, 2019
- Vitamin D is needed for human fertility – goal is 50 ng – Sept 2018
- Omega-3 helps preconception (in addition to pregnancy) – many studies
- Preconception vitamin D is great - every extra 10 ng associated with 10 percent more likely to have live birth – Aug 2018
- Ensure a healthy pregnancy and baby - take Vitamin D before conception
- Better erection associated with better Vitamin D – July 2018
- The earlier the better- preconception vitamin D - June 2018
- Infertility - 71 percent of the time of BOTH partners had less than 20 ng of Vitamin D – Aug 2017
- Many fertilization and pregnancy problems associated with low vitamin D in Saudi Arabia – April 2018
- Poor fertility in both women and men associated with low vitamin D – review Feb 2018
- Hypothesis - Dysfunction of Autonomic Nervous System is associated with low vitamin D – April 2017
- Women had better sexual desire, orgasm and satisfaction after Vitamin D supplementation – Feb 2018
- Fertility of defrosted sperm better if had increased dietary Omega-3 – many studies
- Fertility improved with vitamin D supplement, unsure if low D causes low fertility – Jan 2018
- Testosterone and erectile function increased after vitamin D supplementation – Jan 2018
- Vitamin D - Effects on Human Reproduction, Pregnancy, and Fetal Well-being – Dec 2017
- IVF 60 percent more successful if woman had sufficient vitamin D – Dec 2017
- IVF 50 percent more likely to result in pregnancy if high vitamin D – meta-analysis Nov 2017
- Birth rates doubled with Vitamin D - 300,000 loading dose for men – RCT Nov 2017
- Infertility is also associated with poor Vitamin D Binding Protein – Oct 2017
- Women with PCOS 4 X more likely to develop T2 Diabetes (no surprise, both associated with low vitamin D) - Aug 2017
- Global sperm count dropped by 59 percent in 40 years – meta-analysis Aug 2017
- Testosterone 14% higher in those with high vitamin D – Aug 2016
- Fertility marker (Anti-Müllerian Hormone) improved in a week by a single dose to 50,000 IU of vitamin D – RCT July 2017
- Increased Testosterone and Erectile function, decreased weight with Vitamin D – March 2017
- Women with more than minimum vitamin D were 3.4 X more likely to achieve pregnancy and 1.6 X more likely to have live births – June 2017
- Vitamin D and aspects of female fertility (especially PCOS) – May 2017
- The Role of Vitamin D in Reproductive Health—A Trojan Horse or the Golden Fleece – 2015
- Vitamin D and Human Reproduction – 51 page chapter – April 2017
- Sexual frequency down 20 percent in 20 years (decreased vitamin D not mentioned) March 2017
- Vitamin D2 improved sexual hormones, erectile function etc – Jan 2017
- Association between vitamin D and sperm parameters: Clinical evidence – Dec 2016
- Many fertility disorders associated with low vitamin D, still unsure how much is needed – Dec 2016
- PCOS (polycystic ovary syndrome) 4 times more likely if poor Vitamin D Receptor – Dec 2015
- Poor female sexual function associated with low vitamin D in pilot study – Aug 2016
- Vitamin D, athletes, hormones – June 2016
- In vitro fertilization not helped by vitamin D if ignore high levels and male levels – meta Mar 2016
- More surviving offspring if mother had high vitamin D (sheep) – Jan 2016
- Male fertility 4 X higher if high Vitamin D – Nov 2015
- Low fertility associated with low Calcium intake and low vitamin D – Nov 2015
- Increased fertility (ovarian reserve, FSH) associated with higher levels of vitamin D – March 2015
- Vitamin D and pregnancy – review Nov 2015
- Testosterone levels increased after vitamin D supplementation (342 from 320) – June 2015
- Pregnancy success increased 30 percent if sunny (or vitamin D) one month earlier – June 2015
- Assisted Reproduction – 5 studies concluded vitamin D repletion helps – Review March 2015
- Vitamin D and fertility – Lerchbaum 2012, 2014
- High Testosterone is associated with higher vitamin D in soldiers – April 2015
- Assisted Reproduction might be aided by Vitamin D – review Dec 2014
- Erectile Dysfunction associated with low vitamin D in several studies
- In Vitro Fertilization (D5 SET ICSI) 40 percent more successful if high vitamin D – Sept 2014
- Low testosterone is associated with levels higher than 40 ng of vitamin D (U-shaped)– July 2014
- Feel sexier with vitamin D and-or sunshine
- Vitamin D somewhat assists reproduction – both the mother and the father – May 2014
- Fertility in both women and men improves with more vitamin D (but less than 50 ng for men) – Dec 2013
- Infertility rate is 2X higher for blacks than whites (no mention of vitamin D, nor the man) – April 2014
- Fertility and Vitamin D – several articles
- Male fertility is improved in many ways by vitamin D – Jan 2014
- Vitamin D protects against many types of health problems – review May 2013
- PCBs increased the chance of being Vitamin D deficient by 3 percent – May 2013
- Male infertility associated with low vitamin D levels – Dec 2012
- Testosterone, vitamin D and inflammation – March 2013
- Fertility and sperm
- 130% more piglets after giving gilt Calcidiol, a form of vitamin D – Nov 2012
- IVF 4X more successful for white women with lots of vitamin D – Oct 2012
- Semen worse when vitamin D lower than 20 or higher than 50 ng – Oct 2012
- Testosterone levels related to vitamin D levels up to 30 ng – July 2012
- Reproduction function in males improved by vitamin D – review Aug 2012
- Fertility problem (PCOS) reduced by vitamin D: many studies
- Gonad hormone is associated with vitamin D level in adults– July 2012
- Hypothesis: increased vitamin D will increase erections and decrease CVD – June 2012
- Swine with extra vitamin D more likely to get pregnant and have more and larger piglets – June 2012
- Vitamin D and fertility: a systematic review – May 2012
- How 60 ng of vitamin D enabled pregnancy - a personal story
- Vitamin D associations with erectile dysfunction - April 2012
- Vitamin D - roles in women's reproductive health - Nov 2011
- Overview Women and Vitamin D
- Off topic - the cost of being female
- Hypothesis – Fatigue the day after sex is due to deficiency of Vitamin D, Magnesium, and Zinc
- More vitamin D associated with better sperm – May 2011
- Clinical Trial vitamin D levels and IVF success – May 2011
- Vitamin D and fertility and birth problems with dark skin – Jan 2011
- Testosterone increased 20 percent with daily 3332 IU vitamin D – RCT Dec 2010
- Epileptics have problems with conception - Oct 2010
- Higher vitamin D and 2X higher testosterone in summer than winter – Aug 2010
- Conception and vitamin D
- Vitamin D deficiency and pregnancy - from preconception to birth Aug 2010
- Overview Pregnancy and vitamin D
- Better sperm if have higher level of vitamin D
Clinical trial of 50,000 IU vitamin D weekly to improve IVF success - Phase 4 trial announced July 2017
Vitamin D Supplementation in Vitamin Deficient Women Undergoing IVF Cycles: Does it Affect the Fertility Outcome?
Unfortunately trial is only giving vitamin D to the women, and for only 2 months
They will be measuring results over the next 12 months
Doubt that this clinical trial will be successful
50,000 IU bi-weekly to both man and woman during an entire year would have had far better success.
50% reduction in sperm count around the world in just 40 years - Aug 2017
Skyrocketing Male Infertility May Threaten Mankind’s Survival - Mercola
- "According to the largest meta-analysis of its kind, sperm counts around the world declined by more than 50 percent, to 47 million sperm per mL, between 1973 and 2013, and continue to dwindle"
- "The most significant declines were found in samples from men in North America, Europe, Australia and New Zealand, where many had sperm concentrations below 40 million/mL — a level at which a man will have trouble fertilizing an egg"
Vitamin D was barely mentioned- Full study is on Vitamin D Life Global sperm count dropped by 59 percent in 40 years – meta-analysis Aug 2017
Eating more fish (probably Omega-3 and Vitamin D) resulted in a 16% increase in babies - May 2018
Survey of 501 couples, New York Times
Reportingo n study in Journal of Clinical Endocrinology and Metabolism https://doi.org/10.1210/jc.2018-00385
- "By 12 months, 92 percent of couples who ate fish twice a week or more were pregnant, compared with 79 percent among those who ate less."
IVF 2X more successful in summer (when vitamin D levels are higher) - July 2018
IVF treatment success rate doubles in summers
Men Are Freaking Out About Their Sperm NYT July 2018
- includes highlights of 185 studies Temporal trends in sperm count: a systematic review and meta-regression analysis 2017
52.4% between 1973 and 2011, https://doi.org/10.1093/humupd/dmx022 avaiable at DeepDyve
The word Vitamin does not occur once in the New York Times article nor the study
Vitamin D: Study Finds Impaired Fertility May 2016
RCT of Vitamin D and Fertility - daily for a year - to 16 weeks after birth
This data disagrees with a majority of studies on this page
Became pregnant | Complications | |
Placebo | 38% | 52% |
1400 IU | 33% | 23% for 1400 and 2800 IU |
2800 IU | 39% |
Statistical certainty of the percentages was not given in the abstract
- "Complications during labor, including preeclampsia and postpartum bleeding, were significantly more frequent in the placebo group compared with the combined treatment groups (52% versus 23%, P=0.005)."
- "The study found no difference in other complications including pre-term birth, miscarriage, gestational diabetes, and infections"
- No comment on any differences in Still Births, Death during first year, etc.
- Wonder if mothers getting lots of vitamin D had more alive and healthy children at the one year mark compared to placebo
Why Are Young People Having So Little Sex? Nov 2018
The Atlantic Vitamin D is not mentioned
- "...Americans are in the midst of a sex recession"
- "...crushing economic pressures, of surging anxiety rates, of psychological frailty, of widespread antidepressant use, of streaming television, of environmental estrogens leaked by plastics, of dropping testosterone levels, of digital porn, of the vibrator’s golden age, of dating apps, of option paralysis, of helicopter parents, of careerism, of smartphones, of the news cycle, of information overload generally, of sleep deprivation, of obesity. Name a modern blight, and someone, somewhere, is ready to blame it for messing with the modern libido?
The Disappearing Y Chromosome Atlantic Mag Dec 2019
It’s surprisingly common for men to start losing entire chromosomes from blood cells as they age
- "Now a new study—the largest yet of this phenomenon—estimates that 20 percent of 205,011 men in a large genetic database called the UK Biobank have lost Y chromosomes from some detectable proportion of their blood. By age 70, 43.6 percent of men had the same issue."
No mention of Vitamin D
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