If you've taken to doing handstands or headstands after sex (because your mom's-neighbor's-sister's-dog walker once tried it and then had triplets)—let us stop you right there. Turns out that hoisting your legs up, propping pillows under your butt and other awkward post-sex maneuverings do nothing to get those sperm cells any closer to your egg. So return to cuddling!
According to Jean Twenge, fertility researcher and author of "The Impatient Woman's Guide to Getting Pregnant," those little swimmers get there pretty darn fast. In one study Twenge cites, researchers put small, sperm-sized particles in the back of women's vaginas during their most fertile times. And guess what? Some found their way right to the fallopian tubes within one minute.