Do You Know How to Predict a Baby's Gender?

How up are you on pregnancy old wive's tales? Or how about basic human reproduction? Take this quiz to see if you really know your stuff. However, it's important to realize that some of the theories of gender selection aren't exactly based on "scientific" research.

Photo of a cute baby outside
1. "Male" sperm cells, which carry a Y-chromosome, swim more quickly than the "female" sperm cells, which carry an X-chromosome.