1. Ovulation after abortion and ectopic pregnancy;Sharman,1966
2. Ovulation following therapeutic abortion;Boyd;Am J Obstet Gynecol,1972
3. Return of ovarian function after abortion;Lähteenmäki;Clin Endocrinol,1978
4. Oral contraceptives during immediate postabortal period;Niswonger;Obstet Gynecol,1968
5. Contraceptive therapy following therapeutic abortion. An analysis;Peterson;Obstet Gynecol,1974