Anovulation is a condition where a woman’s body does not release an egg for ovulation. This is also known as anovulatory infertility. It can cause irregular menstrual periods or missed periods. Anovulation is different than amenorrhea, which refers to no menstruation at all.
If you are trying to get pregnant, then missing periods could be a sign of anovulation, which means that there were no eggs released during that particular month’s cycle. In other words, if you do not ovulate during a given month, then you will not get pregnant even if sex takes place during that time since sperm needs to reach an egg in order to fertilize it and make a baby.