Test tube is a type of in-vitro fertilization (IVF) technique. In this technique, baby is conceived out of the womb. In this process of fertilization, an egg is combined with sperm outside the body. The process involves monitoring and stimulating a woman's ovulatory process that is removing an ovum from the woman's body and letting sperm fertilize them in a liquid in a laboratory in the form of an embryo which is then implanted back into the woman's uterus