Question

The egg is returned to the mother's body during test tube baby formation when it reaches

• A. 8 cell stage
• B. 16 cell stage
• C. 8 or 16 cell stage
• D. None of the above

Answer 1

Answer: (C)

8 or 16 cell stage

In vitro fertilization (IVF) is a process by which an egg is fertilized by sperm outside the body. The process involves monitoring and stimulating a woman's ovulatory process, removing ovum from the woman's ovaries and letting sperm fertilize them in a liquid in vitro. The fertilized egg (zygote) is cultured in a growth medium until it reaches 8 or 16 cell stage and is then implanted in the woman's uterus, with the intention of establishing a successful pregnancy. Thus, the correct answer is option C.