Which hollow organ in females where a fertilized egg implants and develops during pregnancy?

• A. Vas Deferens
• B. Cervix
• C. Uterus
• D. Testes

Answer: (C)

The uterus is the hollow, muscular organ where a fertilized egg attaches and grows during pregnancy. After fertilization, the embryo travels to the uterus and implants into the thickened lining (the endometrium). The uterus then expands to accommodate the developing fetus, using its muscular walls to support and eventually assist with birth contractions. The other structures are not the site of implantation: the vas deferens and testes belong to the male reproductive system, and the cervix is the lower part of the uterus that leads to the vagina; implantation occurs in the main body of the uterus.