Just read a different thread and found this
"I've pasted the soy info below - I did CD 5-9 as was having blood work / a scan before that and wanted them to be natural. I just got the Tesco ones (ignore the fact they say menopause on them 🙈) and took 80mg CD 5-7 and then 120mg CD 8-9 although actually didn't take day 9 ones as had a migraine. I took them before bed as can cause headaches etc.
Here's the info I found on them:
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 Soy 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 than 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."
Tempted to try next month