Bedroom acrobatics might be just the thing to keep it interesting behind closed doors, but there's at least one gymnastic move that won't help couples conceive: headstands. Despite the fact that turning your world upside down after sex doesn't give sperm an extra boost in its quest to find and fertilize an egg, this myth remains a persistent one.
Instead of flipping over, most experts say that simply lying flat after sex for about five minutes might help conception by allowing a woman to retain more of the man's semen, but anything more than that is unnecessary -- and could become quite a pain in the neck.
It's also mostly a myth that a man and woman's position during sex can have much effect on conception. Although the missionary or "doggie-style" positions can help sperm get deposited closer to the cervix, the small difference in distance really doesn't matter much according to most experts. That is, unless the woman is among the small percentage of those who have a uterus that's titled backward instead of forward, in which case one of these two positions might be helpful [source: Kelly].