Which of the following progesterones is preferred in combination with estrogen in low dose oral contraceptive pills?
Low dose contraceptive pills are in recent use which contains a very minimal dose of estradiol (about 20 - 35 microgram) and desogesterol (a newer progestin). The desogesterol with a high progesteronic activity is preferred compared to the other three progestins. Ref: Textbook of Gynaecology By Rao, 183 - 184; Harrison's Endocrinology' 2nd edition, Page 199
Desogesterol
Norethisterone
Norgesterel
Levonorgestrel