It seems strange, but not all women, Flavia included, are aware that there is a contraceptive pill that contains only progestin, no estrogen.
It’s good to know how it works given that this is the hormone that ensures contraceptive efficacy.
Progestin has a double action. The first, and most important, is the blockage of ovulation. The second, a supporting but still essential action, is the modification of the cervical mucus. The mucus becomes thick and hostile to the ascension of the sperm from the vagina to the uterus, where the egg cell is. If the egg is not released (ovulation), and the sperm do not reach their destination, fertilization cannot occur. Even the uterine lining, the endometrium, changes and becomes unfit to accommodate a possible fertilized egg. The mechanism thus has multiple actions, which ensures the highest possible contraceptive efficacy with minimal hormonal dosage.
