Lots of reasons: Missing cycles is a common problem. Causes include pregnancy, hormone problems, thyroid disease, polycystic ovarian syndrome among others. If you haven't had a cycle, you should see your doctor for an exam and some lab work.
Answered 7/20/2012
6.1k views
A doctor has provided 1 answer
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question