Women are capable of becoming pregnant without menstruation. Unplanned pregnancies can occur when women are breastfeeding or during menopause, but the chances are less. Firstly, during breastfeeding, the release of prolactin increases and the ovarian secretion of estrogen and progesterone is unbalanced, which can lead to amenorrhea, but the ovaries sometimes ovulate, so if you have a normal sex life, especially during ovulation, it can lead to pregnancy. Secondly, during menopause, as the level of hormones secreted by the ovaries decreases, the ovaries do not ovulate every month, and menstruation may stop and ovulation may occur occasionally, so it is necessary to take good contraceptive measures during menopause.