I'm not claiming this is breaking news - the study was done in 2002. But I've never heard this. I like to comb the web now and then for motivation to keep up with my exercise and I came upon this study mentioned in a few places - this is just one place but it give the details pretty well.
http://www.ovarian-cysts-pcos.com/res5.html
A lot of us with repeat losses are told we have "MTHFR" as a possible cause. I have 2 copies of it. When I was dx'ed with that, I read that what *really* matters is your homocysteine levels. MTHFR maybe just makes it more likely your homocysteine levels are wonky, I don't know - but if you have high h. levels and don't test for MTHFR, it's still a risk factor. Ways to deal with this problem include folgard, which is a prescription b vitamin, baby aspirin, and sometimes injections of blood thinners. I took the folgard and BA...
Anyway - we all know exercise is good for us... but sometimes we need a little more motivation. I found this pretty interesting - perhaps more exercise can help with miscarriage.
Or perhaps it won't but if it motivates you to move more you'll still be benefitting in some areas.