Q.The procedure of GIFT involves the transfer of female gamete to the fallopian tube. Can gametes be transferred to the uterus to achieve the same result? Explain.

No, gametes cannot be transferred directly into the uterus to achieve the same result as GIFT. Here is why.

GIFT stands for Gamete Intrafallopian Transfer. In this procedure, the female gamete (ovum) is collected and placed into the fallopian tube. The fallopian tube is the natural site where fertilisation occurs — the sperm meets the egg here, and the resulting zygote then travels down to the uterus for implantation. …

The question touches on a key distinction in Assisted Reproductive Technologies (ART) — where exactly fertilisation happens in the female reproductive tract. In a natural conception, the egg released from the ovary is swept into the fallopian tube, where it meets sperm. Fertilisation occurs in the ampulla of the tube, not in the uterus. The resulting embryo then travels down the tube over several days and implants in the uterus only after reaching the blastocyst stage.

GIFT — Gamete Intra-Fallopian Transfer — is designed to mimic this natural sequence. The female gamete (the egg) is collected, mixed with sperm, and then transferred directly into the fallopian tube. The key point is that the gametes are placed in the tube, not the uterus. Fertilisation then occurs inside the body, in the tube, just as it would naturally. The embryo then moves into the uterus on its own.

Now, could you transfer a gamete — say, an egg — directly into the uterus and achieve the same result? The answer is no, and here is why.

The uterus is not the site of fertilisation. Its lining (endometrium) is prepared for implantation of an already-formed embryo, not for the meeting of sperm and egg. If an egg is placed in the uterus, sperm swimming up from the vagina would have to reach it there — but the uterine cavity is a large, open space, and the egg has no way to be guided into the fallopian tube from the uterus. More importantly, the environment of the uterus is not suited for the early events of fertilisation. The egg would simply not be fertilised in the uterus, and even if by some chance it were, the resulting embryo would not be at the right stage for implantation — it would be too early and would not survive.