So I've read that, male sperm swims faster than female. so that theory about trying for a boy or girl by your ovulation. I have three boys, and I'm pregnant with #4 so desperately want a girl But I just notice with my three boys I got pregnant very fast literally within a month each pregnancy. And their all boys. so with #4 the same i got pregnant very fast within a month. would that mean it will be another boy since male sperm swims faster thats why I'm always getting boys cause I get pregnant very quick. Just wondering. let me know. thanks.