Greetings all. I'm TTC but I suffer from amenorrhea (no period) due to stress lately. I heard black cohosh does the trick so I've been taking a 540 mg tablet a day. I'm on day two of that. I heard that 12 days after the first day of your period you switch to progesterone cream to help ovulation and continue it until day 28. I wanted to try vitex but besides taking a while to kick in, I heard it may not be safe to take while pregnant, and also that if you stop taking it after becoming pregnant it can cause a miscarriage because of the sudden drop in progesterone. And that if you just use use progesterone cream, you can quit around 14 - 16 weeks with no worries because by that time the placenta is making its own progesterone. Does anyone know when you're supposed to stop taking black cohosh after your period starts? Do you keep taking it for so long as the period is going? Mine usually lasts about 5 days.