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Emily's New Sister - Just for Kids - Understanding Pregnancy

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Will The Baby Be A Boy Or A Girl?

To make a baby, a man's sperm meets and joins with a woman's egg cell inside her body. Inside the man's sperm are a set of instructions that tell the baby to be a boy or a girl. The instructions in the man's sperm cell can either carry the letter X or the letter Y. If the letter is an X, it means the baby will be a girl. If the letter is a Y, the baby will be a boy.

Will The Baby Be A Boy Or A Girl?

Review Date: 7/4/2019

Reviewed By: John D. Jacobson, MD, Professor of Obstetrics and Gynecology, Loma Linda University School of Medicine, Loma Linda Center for Fertility, Loma Linda, CA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

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