In the case of test tube babies (a)egg is fertilized in the uterus. (b)embryo completes its development in a test tube. (c)embiyo is placed in uterus after 2 months. (d)egg is fertilized outside mother s body.
Option D) In test tube baby or in vitro fertilisaton technique, the ovum is fertilised with the sperm outside the body of a woman providing the ovum with the same environmental conditions as it would have got inside the uterus. The zygote formed is grown inside a calture and when embryo (having 8 or more blastomeres) is formed, It is then implanted into uterus where it develops into foetus.
