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Overview

 


GIFT (Gamete Intra-Fallopian Transfer)

GIFT is an early, and very simple ART (Assisted Reproductive Technology) technique devised in the 1980s to achieve pregnancies in most couples who have not been able to conceive using conventional treatments for infertility (despite having good sperm and normal fallopian tubes). Most infertility patients will have their best chance of pregnancy with some sort of ART procedure, and GIFT is the only ART approach that is completely acceptable to the Roman Catholic Church. The success rate with GIFT is even somewhat higher than with standard IVF (in vitro fertilization), but GIFT can be performed only if the patient has normal fallopian tubes and adequate sperm. For cases with abnormal fallopian tubes, IVF is mandated. For cases with poor sperm, we recommend the ICSI procedure pioneered by us and our Belgian collaborators.

GIFT stands for "Gamete Intra-Fallopian Transfer." Gametes, i.e., the female's eggs and the male's sperm, are washed and placed via a catheter directly into the woman's fallopian tubes. This usually involves a minor surgical procedure which allows you to go home the same day with a minor degree of pain that lasts for just a few days. With GIFT, fertilization occurs inside the woman's body (not outside), and mimics the way a normally fertilized egg would begin its journey to the uterus for implantation. Understanding this older and more "natural" ART treatment is helpful for understanding the newer, more complex treatments.


How Does Gift Work?

In a fertile couple, pregnancy begins with the release of an ovum (egg) from the woman's ovaries. The egg enters the fallopian tube where it meets with sperm that have traveled there, following intercourse, from the vagina. The sperm normally fertilize the egg in the fallopian tube. The fertilized egg, now called an embryo, begins to divide and in four days, contains many cells. At this time, the embryo moves from the fallopian tube to the uterine cavity where it "floats" for another two days. The embryo then implants in the uterine wall, and becomes a pregnancy.


Normal fertilization in fallopian tube Implantation in uterus

The GIFT technique follows nature by allowing the eggs to fertilize and develop in the natural environment of the fallopian tube, and then to make their way to the uterus for implantation according to a normal timetable. In contrast, in vitro fertilization (IVF) places fertilized eggs directly into the uterus. One of GIFT's major advantages over IVF is that the technique relies to a far greater degree on the body's natural processes and timetable to produce pregnancy, and is acceptable to those religious groups which avoid the more embryo invasive technologies. In technical IVF terms, we would say that it is the best of all methods of "co-culture".

GIFT is done either via a laparoscopy under general anaesthetic, or by using a catheter passed through the cervix, for which a local anaesthetic and sedation can be used. Once the transfer is complete, the cycle then proceeds as for IVF.


GIFT is often used when: -
  • The couple has unexplained infertility
  • There are problems with the cervical mucus
  • The woman has mild endometriosis.


However, it is not recommended for women who have already had an ectopic pregnancy (and perhaps lost one fallopian tube) because of the risk of another.


Chance for Pregnancy

GIFT is not nearly as popular as IVF today; nonetheless there is still a 50% pregnancy rate per retrieval cycle for GIFT. In older women the pregnancy rate is lower. If an older woman is fortunate enough to yield many eggs, her pregnancy rate can be made equivalent to that of a younger patient by putting in more eggs. GIFT or ZIFT (a variation of GIFT whereby embryos are first fertilized in vitro, and then transferred to the fallopian tubes) actually gives a considerably higher pregnancy rate in older women with cervical abnormalities.

If any ART cycle — GIFT, ZIFT, IVF, etc. — fails to achieve pregnancy, you should consider undergoing more cycles in the future. If you don't get pregnant in your first cycle (and there are no egg problems) you can still get pregnant in subsequent cycles, and the pregnancy rate still remains just as high.










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