Q: What is anovulation? What is the difference between ovulation and anovulation?
A: Ovulation is when an egg is ejected from a woman's ovary and anovulation is when you do not ovulate. Ovulation happens happens about once a month and if you are not pregnant then your menstrual period comes about 14 days after ovulation. When you do not ovulate then your menstrual period, your bleeding, doesn't come or it comes irregularly. An absent period is called "amenorrhea," and pregnancy is the #1 cause of missed periods (amenorrhea). If you are not pregnant, however, then an absent period is the first sign for most women that they did not ovulate.