After my 3 early mc I asked my Dr. She said a healthy pregnancy is a healthy pregnancy and that she only puts the hold on sex if there is bleeding/spotting. She has seen many women who do crazy things or have accidents who never have a problem. In her opinion, in a strong pregnancy you can't shake it loose. (in a delicate pregnancy we don't really effect things much either)

In my mind it would be a shame to waste all those lovely hormones. For me sex when pregnant (until I get too big) is the best. I am sad as this is my last babe that I won't have the extra hormones for long.