I'm 32 years old , I had 2 perfect pregnancies (last one 7 years ago) but then had an abortion at 17 weeks in 2010 and another one also at 17 weeks last october. both fetuses had no visible abnormalities and blood work came clear except for Factor V leiden which came out positive( hetetozygous) and in the fourth pregnancy(second abortion ) I was on blood thinners as soon as i was diagnosed with Factor V leiden but still no luck. My hematologist said that Factor V leiden (heterozygous) alone could not cause repeated abortion. She said it needs other factors too. I'm really concerned about this issue and afraid to ttc again what can I do?