I do see this thread is old but figure the information in it may still be relevant to some people and since someone else revived the thread, may as well share my experience!
My husband and I TTC'd for four cycles with no success. I turned 38 during that fourth cycle. I knew my "clock was ticking." So this current cycle (my 5th cycle of TTC) I used Soy Isoflavones for the first time. I took 150 mg CD 2, 3, 4 and 5, and I took 200 mg CD 6.
It caused me to ovulate like 5-6 days earlier than I usually do (on CD14 instead of CD19 or 20).
And at 11 DPO, I took a pregnancy test... and it was positive!! That would make me currently 4 weeks and 3 days pregnant today.
HOWEVER, the day I ovulated, I had some spotting, which I took to be ovulation spotting... I normally never get that but read that the increased estrogen from taking Soy could make it more likely. But by the next day, the "spotting" turned into bleeding like a light period, and the next day it was heavier bleeding like a moderate period. Same the next day. I even used tampax. Then it got lighter again for a day and seemed to be going away, then just spotting when I wiped for a couple of days, then gone.
I had no idea if I'd totally messed up my cycle and it had "reset" or if the Soy/estrogen caused longer-lasting ovulation bleeding, or what. Hoped it was nothing more serious (read one account of the estrogen causing fibroids or something...). Figured I would just have to wait and see- either I'd get a BFP or I'd eventually get my period again and I'd have to wait and see if that still happened around the usual time or what.
As it turned out, like I said, I got a BFP 11 DPO. The spotting had only been stopped for two or three days by that point.
But then it started again when I got my BFP (which was on June 17th). Nothing major...basically I would get brownish spotting, every single time I wiped, only when I wiped. That was the case 6/17, 6/18, 6/19, 6/20 and 6/21. Then 6/22, 6/23 and today, sometimes the spotting is pink and sometimes it is brown. This morning it was kind of dark pink which was worrisome but then the next time I wiped it was lighter and brownish again.
I've had only very mild, infrequent cramps that don't last long and aren't particularly painful which is pretty normal in pregnancy anyway... so far no red blood, no clots, no bad cramps etc., but it's still very early...
My doctor doesn't normally see patients until they are 7 weeks along so my first appointment isn't supposed to be until 7/15. But I did call the doctor and request that they do bloodwork to test my HCG levels.
I went on 6/20 and my levels were 410. I went again on 6/22, 45 hours later, and my levels were 587. That was only like a 46 percent increase. So when the doctor called with the results, he said that "they did rise, but not as much as I hoped."
He said they like to wait until levels are in the three or four thousands before they do an ultrasound and that for now we should continue to monitor my HCG levels. He did ask if I had kids already, if this was a planned pregnancy, if I ever had a tubal pregnancy, or any surgeries related to my tubes, etc. He said if I got heavy bleeding or bad cramps ("not mild cramps, these would be pretty severe") I should call back.
So, anyway, I am going again this morning to repeat the HCG test and should get the results this afternoon. I'm quite nervous, no idea if this pregnancy is going to end up being viable or not. I did phone yesterday and leave a message for the doctor asking that they also test my progesterone levels when I go today, so hopefully he did end up faxing over a prescription for that, too... I'll find out when I get there like two hours from now!
It IS encouraging to see that several people in this thread used Soy and got pregnant and DIDN'T miscarry. But I can't tell yet whether I am going to be that lucky, I'm not feeling overly optimistic at the moment.
I think when my doctor calls with results of HCG this afternoon, I'm going to request an earlier appointment just to talk and go over history and I'm going to tell him about the soy and the history with the bleeding this month etc and see what he has to say about it all.