When a man's sperm fertilizes an egg inside a woman, the fertilized egg will grow and become a baby. That means the woman is pregnant. The baby grows inside the woman's uterus (say: YOO-tur-us). It takes about 9 months for a baby to be fully ready to be born.
Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor.
© 1995-2021 KidsHealth ® All rights reserved. Images provided by iStock, Getty Images, Corbis, Veer, Science Photo Library, Science Source Images, Shutterstock, and Clipart.com