This is from a post on a another thread:
1-5 = you produce more eggs, and ovulate sooner, with a stronger ovulation.
2-6 = you produce more eggs that usual, but not as many as taking it 1-5. Eggs may be more mature, and ovulation will be slightly more strong than 1-5.
3-7 = The best of both worlds, a few more eggs, and all eggs will be strong & mature, and ovulation will be alot stronger than 1-5.
4-8 = No more eggs will be produced, but the ones already there, will be matured a lot more than usual, and ovulation will be very strong. Ovulation may only be brought forward a teeny bit.
5-9 = You'll have one very mature strong egg, from the ones you already produced on your own. Ovulation will either happen when it usually does, or a few days later, but your egg will be of great quality.
I would suggest to take at least 80mg bc soy is half the strength of clomid. Soy can be taken anytime, but if taken at night, you can possibly avoid side effects and make sure to take them at the same time each day. As for opk, its suggested to start after period ends if cycle is < 35 days, or to start 3 days after period ends if cycle is > 35.