Sperm come out of the penis and go up into the vagina and if one of the sperm connects with an egg, the two may combine to make a baby (actually, it’s called an embryo at this stage).

WASHINGTON — They call it kangaroo care: A premature baby nestles skin-to-skin against mom's bare, warm chest. In Malawi, mothers' bodies take the place of too-pricey incubators to keep these ...