Is the ovarian reserve influenced by vitamin D deficiency and the dress code in an infertile Iranian population

Background In the recent years, vitamin D has become a topical subject and a focus of research not only in reproductive medicine but across many medical disciplines. In reproductive medicine, studies have identified an association between vitamin D status in women and ovarian reserve. In humans, exposure of the skin to sunlight is the main important source of vitamin D. A dress code of wearing concealing clothing is a risk factor for vitamin D deficiency. The objective of this prospective observational study was to evaluate the correlation between vitamin D deficiency and ovarian reserve in a population of infertile women in Iran. As part of the basic fertility assessment of study participants, blood tests were taken to measure vitamin D concentration and transvaginal ultrasound scans were performed on day 2–5 of the cycle to determine antral follicle count (AFC). All study participants were assessed by a reproductive medicine specialist and consultant dermatologist to classify their skin types according to the Fitzpatrick classification. In addition, the dress code of each study participant was recorded noting the percentage of exposed skin not covered by concealing clothing.