Progestin in the form of birth control works a few ways to prevent pregnancy, ACOG explains. It thickens mucus in the cervix, making it tough for sperm to enter the uterus and fertilize an egg ...
An IUD is an effective method of nonpermanent birth control. According to the Centers ... College of Obstetricians and Gynecologists (ACOG), the expulsion rate is 2 to 10% within 1 year of having ...
Additionally, the birth control patch does not protect against ... The American College of Obstetrics and Gynecology (ACOG) advises women who are obese not to use the patch because extra fatty ...