So, I am thinking about buying a bottle of soy isoflavones to try next cycle if this cycle is a bust. What cycle day do I start taking them? When I do ovulate its usually on CD15. I have seen online to take them on CDs 1-5, 3-7 and 5-9. Does it matter which days I take it or is there a more success rate with certain days? Also, should I start out with 100mg or 150mg?