Zoology - Reproductive Health Question with Solution | TestHub

The sequential oral contraceptives have two phases and referred to as biphasic. In the first phase, only estrogen-containing tablets are given during the first two weeks of the three‐week menstrual cycle. Later, the combined estrogen and progesterone tablets are given during the third week. Combination oral contraceptives contain both hormones throughout the three-week cycle. Progesterone suppresses ovulation and production of LH while estrogen suppresses the production of FSH.