Whether you're trying to conceive or you're already pregnant and wondering about the sex of your unborn baby, a pregnancy gender quiz can be both entertaining and informative. However, it's important to realize that some of the theories of gender selection aren't exactly based on "scientific" research.

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

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False