GIFT / ZIFT

Gamete intrafallopian transfer (GIFT):  Eggs and sperm are collected from the female and male partners and combined together in a dish in a lab then the mixture is inserted into the fallopian tubes. Fertilization happens inside the body and the embryo implants naturally. Although this procedure was once commonly practiced, it's rarely used today because the success with IVF is usually greater.

Zygote intrafallopian transfer (ZIFT): As with GIFT, the eggs and sperm are mixed in a dish in a lab, however, fertilization is allowed to take place creating a zygote which is then replaced inside the fallopian tubes. This procedure is no longer commonly performed because it has a lower success rate than IVF.

One of the drawbacks of GIFT/ZIFT is that they involve two separate procedures:
Egg retrieval one day followed by another procedure (laparoscopy) later to transfer the gametes or zygotes into the tube which means having to undergo anesthesia twice.