Medically reviewed by Anita Sadaty, MD Progesterone is a naturally occurring hormone that helps prepare the lining of your uterus for pregnancy. Progestin is any natural or man-made substance that has ...

like Micronor and Slynd. 4. Breast tenderness "Breasts are sensitive to hormones and birth control pills contain powerful synthetic hormones," Gersh says. The estrogen in the pill can stimulate ...

Although birth control pills are safe for most people to take ... They can contain a lower dose than COCs, and some, such as norethindrone, are available in 0.35 milligram (mg) tablets.

Oral contraceptive or birth control pills contain hormones that prevent pregnancy. It is one of the most reliable methods of contraception.