R.C.
Ovulation precedes a normal menstrual period. That being said, a person can have light or heavy bleeding and it NOT prove to be an indication that they ovulated. The bleeding can be just random shedding of the uterine lining from hormone fluctuation. Ovulation could occur (or could have already occurred) this cycle, but, just not on the 14th-16th day as expected. By using the progesterone before proof of ovulation, it is likely acting as a contraception in preventing ovulation each month as you said. If you are trying to conceive, why would you want to prevent ovulation by using progesterone? Progesterone's function is to support a pregnancy by increasing the blood vessel and tissue formation in the womb. Natural progesterone used inconsistently is not a good idea either because it causes the progesterone levels to rise and fall randomly. This could effect implantation if conception did occur and could be to blame for your period being late. You really need to be under a professional's care in order to give yourself the best chance at conception. Achieving pregnancy is not an exact science. Even if you time sex and ovulation perfectly, you still only have a 20-25% chance of conceiving in any given month. Please get a copy of the book "Taking Charge of your Fertility" by Toni Weschler to learn more about this subject. Nurse Midwife Mom