<prompt> Which of the following progesterones is preferred in combination with estrogen in low dose oral contraceptive pills?DesogesterolNorethisteroneNorgesterelLevonorgestrel  <response>: 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; Harrisons Endocrinology 2nd edition, Page 199 