Some couples seem to have kids of only one sex-no matter how many they have. Do some guys just produce one gender or the other?
It’s dimly possible that some kind of as-yet-unknown genetic fluke predisposes some guys to produce kids of only one gender. Much more likely, however, is that “runs” of same-sex kids are just the workings of random chance. Most people have only a foggy idea of what true randomness looks like. They think that, in the case of coin tossing, a random occurrence would mean something like a head, a tail, a head, a head, a tail, and so on. In fact, in any truly random phenomenon, there are “runs” of results. Try flipping a coin a hundred times. It’s highly likely that you’ll get at least one run of four heads or four tails in a row. Flip the coin enough, and you’ll find longer and longer runs-though, of course, they won’t happen very often. In a population of hundreds of millions of couples, it would be highly unusual for there not to be families of, say, eight girls, or seven boys, or whatever. That’s how randomness works, and it’s the most likely explanation for such seemingly unusual families.
Read more of Dr. Fisch’s advice in his book:
Size Matters; The Hard Facts About Male Sexuality That Every Woman Should Know…And All The Knowledge You Need To Improve Your Sex Life