Heterosexual couples trying to start a family have tools to tell them when it’s time for baby-making sex: apps can track a woman’s cycle; over-the-counter tests can pinpoint ovulation. But it turns out the sex they’re having the rest of the month could be just as important for starting that bundle of joy.
During human (or any mammalian) fertilization, if more than one sperm manages to get inside an egg, there are typically no survivors. A violent competition between the two sperm brings the whole kit and caboodle to a tragic end.
Why go through the messy act of "intercourse" when you can get your wife/girlfriend/lover pregnant the easy way: with a conception cap. The cap works by having the man squirt his baby-making goods into the cap, then placing the cap at the woman's cervix opening. With any luck, the woman will soon be vomiting and…