I'm assuming you mean your orgasm... no, it can't hurt the baby. If you've got the mojo, then have at it, assuming your doctor has said it's ok (unless you have some problems, then it's usually ok).
My doctor said that sex is totally safe up until the point that you give birth (just no acrobatics, lol). Just be prepared because semen and orgasm can bring on contractions. I had sex about 2 weeks ago and was in some discomfort for about 3 hours after. I had what felt like "real" contractions (back pain . . . . like bad menstrual cramps). It eventually went away and the doctor said it was no big deal. We're 36 weeks this week anyway . . . if it brings on the "real" thing, it's ok. We can have our babies safely at any time at this point.
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Mommy to 2 1/2 year old Brayden and 5 day old Leighton.
It won't hurt the baby but it might hurt you!!! Every time DH and I, well, you know, I get really uncomfortable afterwards. While it's fine during the act, it's never comfortable for me afterwards. My whole stomach gets tight and it feels like the baby is moving all to one side. But like the others said, if your doctors haven't given you any restrictons on sex, then you should be fine!
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***Anna***
~Ella Ann, July 2, 2007~
~Madilyn Mya, September 21, 2008~
thank you everyone for the replies. i havent really been able to enjoy it cuz i worry about him not liking it. hopefully now ill like it a little bit more. i wouldnt mind AT ALL if it started labor, bring it on!
Every time DH and I, well, you know, I get really uncomfortable afterwards. While it's fine during the act, it's never comfortable for me afterwards. My whole stomach gets tight and it feels like the baby is moving all to one side. But like the others said, if your doctors haven't given you any restrictons on sex, then you should be fine! 
