Of all the old wives' tales and myths surrounding pregnancy, some of the most popular involve determining a baby's gender. What's more fun than trying to figure out if there's a little boy or girl behind that growing bump? Here are some of the most popular beliefs circulating – and whether they can really reveal whether you should start buying pink or blue.

"I used to be friends with a nurse who told me the way to tell if a woman is having a boy or girl is by determining if she's more or less attractive when pregnant," says Dan Green of Round Lake Beach, Ill. "If it's a boy, the mom-to-be is usually less attractive because the hormonal mix between the two genders and vice versa for girls."

After learning that, Green began guessing baby genders and guessed right 19 out of the first 20 times he tried, only missing one of his sisters. "One time, in fact, I guessed that my colleague was having a girl, and she said I was wrong – her doctor had told her it was a boy," says Green. "But after her next visit to her doctor, she came in and said the doctor had made a mistake, that I was actually right. So there may be some merit to this myth."

Green thinks the reason he misjudged his sister was that he was too close to her to tell whether she was glowing or not. But Green was right on all the other guesses – including predicting the sex of both his two kids.

Ira H. Silverman, a public relations executive from South Bellmore, N.Y., has found success with a similar technique but one based on the opposite premise. "If a woman's face doesn't change at all during pregnancy, she's having a boy," Silverman says. "If her face changes a little or a lot, she's having a girl. Her nose could widen, the texture of her hair could change and her face could get puffier or gaunter. If it changes even a little bit, it's a girl."

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