Embryo Transfer technique is used very increasingly nowadays for infertile couples. In this type of technique, male and female gametes are fused outside the mother's body. It is used either when the male cannot produce enough sperms to fertilize the ovum or the females can not release ova for the purpose. After the embryo reaches 8 celled stages, known as the morula, it is transferred in the female fallopian tubule. If it is in the 16 celled stage, known as blastomere, it is transferred directly in the female uterus.