Hi , I am 29y.o. I have given birth to a full term baby girl in 2005 and a boy in 2011. With both pregnancies I was told during US that I had a subchoronic hematoma, I never had any bleeding,I was followed by a perinatologist and didn't have any complications due to the hematoma. I got pregnant again 2/2014 , I was referred to MFM again for a "large subchoronic hematoma " I don't know what the measurements were but I was told by the tech that the hematoma was 2 times the size of my baby and placenta. I never had any cramping or bleeding . I had an ultrasound every 2 weeks and had no problems. I went to MFM at 16 weeks for ultra sound and my dr said " I'm sorry your baby has no heart beat" in May 2014. I never had an symptoms of a miscarriage. I was induced and after my baby boy was born my dr ordered genetic testing and my baby was sent to pathology but results showed no cause for miscarriage. My ob say he "thinks "it could have happened because of hematoma. My questions are what could cause me to have this hematoma with all 3 of my pregnancies? What can I do to prevent? My OB wants me to have a preconception appt with perinatologist , the only possibility he gave me was maybe I have factor V? What would Factor V diagnosis mean for a future pregnancy? I have no other known health problems, how likely is it that I would have a sch again? Thank you so much!