Women can get pregnant during menopausal transition or perimenopause, according to the National Institute of Aging. The irregular menstrual period common during perimenopause makes it harder to predict when an ovary is releasing an egg and the woman is most fertile.
Perimenopause can begin eight to 10 years before menopause, states Cleveland Clinic. It is when the ovaries gradually produce less estrogen and lasts up until menopause when the ovaries stop releasing eggs. Possible symptoms include hot flashes, worse premenstrual syndrome, breast tenderness, fatigue, mood swings, irregular periods and trouble sleeping, reports WebMD. Taking prescribed low-dose birth control pills helps relieve hot flashes and prevent unplanned pregnancy.