What my dr told me, because I had 2 early Mc and one mmc 10 weeks , was that my progesterone was low with all of them, she said it could have caused the mmc in the way that the baby wasn't snuggled in well and not receiving proper nutrients from lack of progesterone, we had that baby genetically tested and all was perfectly fine with it!!! So there's no reason it should have died , I also had picture perfect 28 day periods with ovulation on cd14 .... worth a shot, especially if you get pregnant you can just request to be put on it.. if your dr gives you any grief tell him about this pregnancy, but my drs were great about doing things for me, and when i got pregnant with dd they checked my progesterone twice two days apart and sure enough it was dropping again so they started me on vaginal progesterone at night and she's a beautiful healthy 11 month old now!!!