How Does Loestrin 24 Fe Work?
Loestrin 24 Fe is a combined oral contraceptive, which means that it is a birth control pill that contains two different types of hormones. It contains both an estrogen (ethinyl estradiol) and a progestin (norethindrone). Most importantly, the hormones in Loestrin 24 Fe prevent pregnancy by stopping ovulation (the maturation and release of eggs from the ovaries). However, it also works to prevent pregnancy in two other, less important ways. Loestrin 24 Fe changes the cervical mucus (the fluid of the cervix, which is the lower, narrow part of the uterus that is connected to the vagina), making it more difficult for sperm to enter the uterus. Lastly, Loestrin 24 Fe alters the lining of the uterus (called the endometrium), making it less receptive to an embryo.
