<blockquote><font class="small">In reply to:</font><hr /><p>It is thought that in the absence of gravity, the fertilized egg will not descend the fallopian tubes properly and an ectopic pregnancy might result. Not a good thing to have happen in any event but especially 200 miles up.<p><hr /></p></p></blockquote><br /><br />I doubt it. The egg doesn't just float down the fallopian tube (which is a good thing because the tube isn't down all the way; the egg has to go up first). The tube actually contracts to push the egg along. But other things could certainly go wrong, and I could easily see where stress and disrupted circadian rhythms might affect a woman's cycle.<br /><br />So far, most astronauts are older. A woman's fertility declines after age 30, so even those astronauts who are still menstruating are past their childbearing prime. This will reduce the chances of pregnancy somewhat, but also increase the risk of complications should pregnancy result.<br /><br />Bottom line is, nobody really knows what might go wrong. Studies with egg-laying animals hatched in space show that microgravity does affect them, so I don't think anyone should try for a pregnancy in space. Even safe sex may be too risky from this perspective.<br /><br />Speaking of safety, one thing not often considered when people discuss sex in space is the safety aspect. We all know about "the wet spot". That'll occur in space too, but it won't just leave a messy patch on the linens. It'll float, possibly getting into electronics. Not a good thing. Smell is another issue; in the confined areas of space vessels, there'd be no getting away from the odors of intimacy, and they'd probably get quite aggravating to other crewmembers (especially if they're jealous <img src="/images/icons/tongue.gif" /> ). <div class="Discussion_UserSignature"> <p> </p><p><font color="#666699"><em>"People assume that time is a strict progression of cause to effect, but actually from a non-linear, non-subjective viewpoint it's more like a big ball of wibbly wobbly . . . timey wimey . . . stuff."</em> -- The Tenth Doctor, "Blink"</font></p> </div>