Correct Answer - D
In IVF method, popularly known as test tube baby programme, ova form the wife/donor (female) and sperms from the husband/donor (male) are collected in the laboratory. The zygote or early embryos (with upto 8 blastomeres) could be tranferred into the Fallopian tube (ZIFT) and embryos with more than 8 blastomeres into the uterus (IUT). This is in vitro fertilisation (IVF - fertilisation outside the body in almost similar conditions as that in the body) followed by embryo transfer (ET)