1. Amenorrhea during and after pill use;Kaufmann;Contracept. Fertil. Sex.,1983
2. Fertility and characteristics of ovulation after discontinuing oral contraception;Gaspard;Contracept. Fertil. Sex.,1984
3. Fertility following hormonal contraception;Spira;Contracept. Fertil. Sex.,1983
4. Amenorrhea and the pill;Verdino;Lyon Mediterr. Med. Med. Sud Est,1983
5. Post-“pill” amenorrhea—cause or coincidence?;Jacobs;BMJ,1977