A test-tube baby is a baby that develops from an egg which has been removed from the mother's body, fertilized, and then replaced in her womb in order that it can continue developing. A baby developed from an egg that was fertilized outside the body and then implanted in the uterus of the biological or surrogate mother. a baby that develops from an egg removed from a woman's body, that is then put back inside the woman to continue developing
a baby conceived by fertilization that occurs outside the mother's body; the woman's ova are removed and mixed with sperm in a culture medium - if fertilization occurs the blastocyte is implanted in the woman's uterus