Describe the ‘in vitro fertilization’ technique of reproduction in humans.

In IVF or invitro fertilization technique, fertilization takes place outside the body. In this technique, doctor collects freshly released egg and sperms and keep them together for a few hours for IVF. In case fertilization occurs, the zygote is allowed to develop for about a week and then it is placed in the mother’s uterus. If the embryo gets implanted in the uterus successfully , then normal pregnancy occurs and baby is born like other baby. Babies born through this technique are called test-tube babies.