I wasn't on clexane while pregnant with Charlotte only aspirin. She was stillborn and it was the night I had her they gave me the clexane as they were worried about blood clots as my blood pressure was pre eclampsia high. The next day they ran a stack of bloods (which all came back fine). But our OB decided to run them again 8 weeks later as pregnancy and clexane can mask the problems. So lucky she did or we wouldn't know about the mthfr gene I have. So am back on it for next pregnancy (our embryo was put back in on Wednesday).