Also known as Tubal Embryo Transfer (TET), it is an assisted reproductive procedure. The only difference between In vitro fertilization, embryo transfer and ZIFT is that the fertilized embryo is transferred into the fallopian tube instead of the uterus. A woman’s’ ovaries are stimulated with medications to increase the probability of producing multiple eggs. The eggs are then collected through a process called aspiration and then fertilized in a laboratory for 24 hours and then transferred through a laparoscopic procedure where a catheter is placed in the fallopian tube and the fertilized egg is injected.