I have a clotting disorder too. It was discover when I was pregnant with my first. I was put on fragmin (similar to clexane) and 100mg of aspirin. He was born at 40 weeks 2.9kg. My next pregnancy we lost at 16 weeks. I was on all the same medications. He had stopped growing due to IUGR. I gave up on being pregnant and IVF, but then found out last year I was pregnant again. Same protocol again. He was born premmie, 8 weeks earlier at 1.1 kg. He also had IUGR.
My babies would have never been born without fragmin and aspirin. Has your new ob done any blood tests to prove your condition has changed? I would be looking at your history before agreeing with ob. Is this the same ob as last time?
I wish you the best of luck.