Do Female Orgasms Aid Egg Fertilization?
Best-selling author Mary Roach included a whole chapter on this question in her book Bonk. The fourth chapter, “The Upsuck Chronicles”, concludes with a fertility expert saying: “I think by now you know how science is. You think you know a lot until you start to ask some really basic questions, and then you realize you know nothing. I know a lot about artificial insemination, but I have no idea about the answer to [this] very simple question.”
Scientists don’t know if female orgasms, or uterine contractions, improve the likelihood of fertilization, or pregnancy—but I think monitoring the spermy success of humans, with or without uterine contractions, must be easier than figuring out how women orgasm in the first place!
Some animals offer easier, and less shy, reproductive subjects:
Uterine contractions have been shown to increase pregnancy in pigs—so much so that some lucky farm workers manually “stimulate” sows during artificial insemination. Interestingly (to ME anyway), pig farmers don’t know if the sows actually orgasm, just that the uterine contractions increase the number of little piggies. (Next time you enjoy your Grand Slam breakfast, don’t forget to mentally tip the bacon stimulators.)
Many female cats have sex induced ovulation (egg release) that triggered by the spines on a male cat’s penis. The backward spines scrape and puncture the vaginal walls and this triggers ovulation…also explaining the wild screeching noises heard in the back alley. (Dear mom, I still prefer your “Oh, it’s just a cat fight…”)