Vitamin D and fertility. Is there a connection?

The Holistic Fertility Show

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Vitamin D plays a crucial role in reproductive health and fertility for both men and women. Research indicates that vitamin D deficiency is significantly more prevalent among infertile individuals, suggesting its potential impact on fertility outcomes. In women, vitamin D influences ovarian function by regulating anti-Müllerian hormone (AMH) levels, which are associated with ovarian reserve. It also enhances endometrial receptivity, improving the likelihood of embryo implantation during in vitro fertilization (IVF) treatments.

Studies have shown that women with sufficient vitamin D levels experience higher pregnancy rates and better-quality embryos compared to those with deficiencies. Additionally, vitamin D supplementation has been linked to improved insulin resistance and hormonal balance in women with polycystic ovary syndrome (PCOS), a common cause of infertility. This supplementation not only aids ovulation but also reduces the risk of pregnancy complications such as miscarriage and gestational diabetes.

In men, vitamin D is associated with improved semen quality, including sperm motility and morphology, which are critical for successful conception. Vitamin D’s anti-inflammatory properties also play a role in mitigating conditions like endometriosis and uterine myomas, which can impair fertility in women. Furthermore, observational studies suggest that maintaining optimal vitamin D levels may reduce the risk of adverse pregnancy outcomes such as preterm birth and preeclampsia. Despite these findings, some studies highlight mixed results regarding the direct impact of vitamin D on natural fertility, emphasizing the need for further research to establish definitive conclusions. Nonetheless, ensuring adequate vitamin D levels through diet, sunlight exposure, or supplementation remains an important consideration for individuals facing infertility challenges.