Sex during pregnancy

Unless your doctor says otherwise, sex during all three trimesters of pregnancy is not only fine, it's healthy! You may want to vary your activities from what you usually do; in fact, you'll probably have to because of your changing body.
Many couples worry about the effect of sex on their unborn child. But the good news is there is no adverse effect. The fetus is well-protected and unaffected by any pleasure the mom-to-be might be experiencing.
Some women feel more sexy during pregnancy, some less. Some men find their partners sexier during pregnancy, some don't. What will actually happen is that your sexual desire and "those sexy feelings" will ebb and flow over the course of the pregnancy.
You will probably want to experiment with positions (especially third trimester, when you're at your largest), vary the frequency, be flexible with activities, and most importantly of all, communicate well with your partner. Hormones will be fluctuating, all kinds of new feelings will arise, and your physical being will be changing dramatically.
Try your best to go with the flow, and don't forget your own satisfaction along the way. So have fun....