Our Dr said sex was perfectly ok during the first tri and that there was no evidence that it causes m/c. She said it was more to do with how I felt, morning sickness etc.

We still didn't DTD until we were about 15 weeks (much to Dh disgust) as I always felt quite sick in the first tri, now I just don't have the energy .

I guess its just up to you, if your concerned talk to your dr about it maybe try a possie that doesn't allow such deep entry ?

Nae x