Fertilization in humans occurs in which structure?

• A. Fallopian tube
• B. Uterus
• C. Vagina
• D. Cervix

Answer: (A)

Fertilization occurs in the fallopian tube. After ovulation, the ovulated egg is picked up by the fimbriae and enters the fallopian tube, where it waits for a sperm to reach it. Sperm travel from the vagina through the cervix and uterus to reach the tube, and in the ampulla region of the tube they can meet and fuse with the egg. This is the environment and timing that allow a zygote to form, after which it begins to divide and move toward the uterus for implantation. The uterus is the site of implantation and further development, while the vagina and cervix are gateways for sperm entry, not the site of fertilization.