The inability to conceive despite unprotected sexual intercourse is known as infertility. A man who is unable to inject semen in a female genital tract or has low sperm count can take the help of Artificial insemination. In this technique sperm from a husband or healthy male donor is collected and artificially injected into the vagina or uterus. In IVF and ZIFT, sperm and egg are allowed to fuse in a laboratory under simulated conditions and then the embryo is transferred into the fallopian tubes. In GIFT, Ovum from a donor is transferred in a fallopian tube of another female who can provide a suitable environment for fertilisation.