I was born with under developed ovaries, the doctor I go to now has put me on birth control. I have not had my menstrual cycle yet. I have a twin sister who s a minute older and she has had her menstrual cycle since age 13. They tell me that I may never have children and I m 20 years old. Are there any others out there who have the same thing I do , and what can I do? Please I m at a loss thank you.