Here's the info I always went by!!!
WHEN?
You take Soy Isoflavones, like Clomid, on either CD 1-5 , 2-6, 3-7 , 4-8 or 5-9.
If you take soy Isoflavones during the later time bracket, for example CD5-9, you shall strengthen the egg that has already started growing producing a healthier egg. The earlier in your cycle you take It, the higher your chance of releasing multiple eggs but these eggs will not be as mature as the eggs grown from taking Soya later.
A lot of women will choose the middle cycle (3 -7) allowing time for a strong and healthy egg to develop without erasing the chance of a second egg being developed and released.
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 alot 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.
DOSE?
The dose is really down to you but you should always use the lowest amount that works for you.
With Clomid the starting dose is 100mg. Soya Isoflavones are said to be half the strength of Clomid, so it makes sense for the starting dose to be 100mg.
The trouble with 100mg of soya is that the capsules tend to come as 40mg. So you have a choice of starting at 80mg.
Some women change the dose on different days. So they may start at 120mg for the first 3 days then give an extra boost for the last 2 days with 160mg.
As I have said though, use the lowest dose possible for yourself. If you ovulate using 120mg/day stick to that for a few cycles. GIVE IT A CHANCE. It is said that it takes 3months to get the full benefits of what you are taking. NEVER EXCEED 200mg/day.
OTHER BENEFITS?
The following potential health benefits are attributed to Isoflavones:
Reduce heart disease risk
Protect against prostate problems
improve bone health
Reduce cancer risk