The hormonal changes that accompany perimenopause cause changes to the menstrual cycle pattern, and some have suggested there can be a “surge” in fertility at perimenopause. But there’s no evidence ...
If you don’t ovulate, you can’t become pregnant. The progestin in the injection also thickens the mucus on your cervix to help prevent sperm from getting through the cervix to the egg.
Menopause signals the end of a woman’s reproductive years and happens naturally between age 45 and 55 (the average is 51). After 12 months with no periods, a woman is considered postmenopausal.