Depends on the reason for none.

I've read some of the comments and understand were people are coming from. But I was on Depo for almost 6 yrs. but not as a form of BC I was on it b/c the migraine headaches got to bad. I was have 3 or 4 a month and they would take me out of commision for at least 2 days. Try holding down a job where you are taking at least one sick day a week. Once the depo took effect I went from the 3 or 4 migraines a month to 4 or so a year. My periods cause major hormon fluctuations which cause the migraines. the depo stops your cycle by making your body think it is pregnant. The downfall to depo was that I did gain weight and am now having problems getting it back off. I went off Depo in May 06'. My cycles returned by August 06' and I am back to migraines again. But my husband and I are TTC and I will have to deal with them until I am pg. the only problem I have now is the med I take to get rid of the migraine says you shouldn't take it if you are ttc. So into the Dr. I go again to see if there is something else I can try.