When the hypophysis which regulates the body's hormones and menstrual cycle, is not functioning properly, it can lead to an ovulation disorder. Some women may have no ovulation or very irregular menstrual cycles due to a hormonal imbalance that can be caused by stress, a thyroid disorder, being overweight or underweight, and poor nutrition.
The most common overall cause of female infertility is the failure to ovulate, which occurs in 40% of women with infertility issues. Not ovulating can result from several causes, such as:
- Ovarian or gynecological conditions, such as primary ovarian insufficiency or polycystic ovary syndrome.
- Aging, including "diminished ovarian reserve," which refers to a low number of eggs in a woman's ovaries due to normal aging.
- Endocrine disorders, such as thyroid disease or problems with the hypothalamus, which affect the hormones produced by the body so that there might be too much or too little of some hormone or a group of hormones.
And the last but not least thing to mention are lifestyle and environmental factors.