Currently, the literature highlights vitamin D supplementation and ideal circulating levels in various audiences, but little is said about vitamin D deficiency in women of childbearing age.

The World Health Organization (WHO) recommends exclusive breastfeeding up to six months of age and continuing breastfeeding until two years of age or older, together with the introduction of appropriate complementary foods.

The natural and permanent cessation of menstruation is termed menopause, which can also occur due to surgical procedures or treatments for some conditions such as cancer chemotherapy and acquired immunodeficiency syndrome (AIDS).

Caused by a fungus, candidiasis is characterized by the altered presence of Candida albicans in the vaginal microbiota, since it is part of this flora affecting most women of childbearing age.

In recent years with the development of genomic research, many studies have shown that the human microbiota has an important relationship with female reproductive health.