In vitro fertilization involves the uniting of egg and sperm in:

• A. Inside the woman's body.
• B. In a laboratory dish.
• C. In the uterus.
• D. In a petri dish.

Answer: (B)

Fertilization in IVF happens outside the body, in a controlled laboratory setting. The term “in vitro” means “in glass,” reflecting that the egg and sperm are united in a lab dish rather than inside the woman. In this process, eggs and sperm are combined in a laboratory culture dish, allowing fertilization to occur under precise conditions before any embryos are transferred to the uterus. This distinguishes IVF from natural fertilization that would occur inside the body.