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Vitamin D for Fertility: Is it Really a Natural Fertility Booster? What the Latest Studies Say?

vitamin d for fertility

Vitamin D, C, B… are the basic need of our bodies and these help in providing energy to the body. Moreover, vitamins are helpful to run normal body functions. Different types of vitamins are present that can be intake by diet. All kinds of vitamins perform their unique functions.

In the same way, vitamin D is provided mainly to our body by contact with sunlight. So we can say that people who live in colder and darker places are deficient in vitamin D. People who rarely go outside also suffer from the deficiency of vitamin D.

Other factors contribute to the deficiency of vitamin D like improper diet, dark skin, aging, geographic location, and obesity. Vitamin D provides strength to our body organs as well.

Association between vitamin D and fertility has been conceived based on several observations. For example, vitamin D receptors and enzymes have been found in endometrium.

It has been found that deficiency in vitamin D caused poor fertility, and it’s also reduced the functioning of reproductive organs. So what is the relation between vitamin d and fertility? It is really one of the vitamins to boost fertility?

Does Vitamin D Affect Fertility?

Women having a high level of vitamin D have more chances to conceive. Deficiency of vitamin D often associated with infertility. The vitamin D receptor is present in many organs like ovaries, uterus, and placenta. So it is helpful in the process of conceiving. [1]

But there is no link found between vitamin D and miscarriage. according to the study, published November 14 in the journal Human Reproduction. [2]

Another research has been revealing that vitamin D plays essential roles in both female and male reproductive function. And any deficiency of this vitamin can cause infertility in both men [3] and women [4].

How Does Vitamin D Affect Fertility and Pregnancy?

  • Enhance reproductive health.
  • Improves sperm quality.
  • Lowers the danger of infections, asthma, and eczema in newborns.
  • Decreases vaginal infections.
  • Improves the immune system.
  • Lowers the chances of miscarriage.
  • Plays a role in immune inflection in both mother and baby.

how vitamin D increase fertility

How much Vitamin D to Take for Fertility?

To test vitamin D level, a blood sample is taken, and 25-OH vitamin D level is calculated:

  • The satisfactory level of vitamin D is 30ng/ml or greater.
  • While 21-29ng/ml is considered an inadequate level of vitamin D.
  • Below 20ng/ml is considered insufficient for vitamin D.
  • RDA for vitamin D is 600IU.

Based on previous studies, it has been concluded that only 25.7% of the patients are having levels of vitamin D above 30ng/ml. The rest of the patients are deficient in vitamin D. So it can be concluded that women with a sufficient level of vitamin D have more chances to test positively for pregnancy.

Based on past studies, it is also shown that vitamin D is crucial for an embryo to implant and stay healthy within the uterus. So vitamin D for fertility affects both mother and baby.

How Much Vitamin D Should I Take During Pregnancy?

Vitamin D’s importance is not only limited to achieving pregnancy, but it is also involved in the process of a healthy pregnancy. So it’s necessary to intake vitamin D during pregnancy as well.

Vitamin D deficiency often leads to:

  • Preterm birth
  • Gestational diabetes
  • Bacterial vaginosis
  • Preeclampsia (a high blood pressure).

All these factors make vitamin D one of the vitamins to boost fertility.

Research has shown that a dose of 2000-4000 IU of vitamin D is safe and perfect for mother and baby during pregnancy. One thing that should be kept in mind that newborns are largely dependent on maternal vitamin D.
So, people living in darker and shady places are at high risk of vitamin D deficiency.

Related Article: Can Acid Folic Vitamin Boost Female and Male Fertility?

YouGettingPregnant.com Advices

  1. All pregnant women are advised to test their 25-OH vitamin D level to check their level of vitamin D.
  2. Standard doses of vitamin D should be taken that are safe and inexpensive. (It is necessary to consult your doctor)
  3. Vitamin D repletion may take 60-90days. Start using it from early pregnancy stages or a little before pregnancy.
  4. Take vitamin D with a fat-containing meal to increase its absorption in the body.
  5. Too much vitamin D can be toxic as well. The safe upper limit of vitamin D is 60ng/ml.
  6. Supplements of vitamin D should be added in your diet before pregnancy to meet the optimum level of vitamin D during pregnancy.


[1] https://pubmed.ncbi.nlm.nih.gov/30085176/

[2] https://academic.oup.com/humrep/article/33/1/65/4582928

[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6516448/ 

[4] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5545066/