Gamete intra-Fallopian transfer or intrauterine insemination after controlled ovarian hyperstimulation for treatment of infertility due to endometriosis

We compared the effectiveness of gamete intra-Fallopian transfer (GIFT) and intrauterine insemination (IUI) after controlled ovarian hyperstimulation (COH) in the treatment of infertility due to endometriosis. This was a retrospective study carried out at a tertiary teaching medical center. A total of 127 consecutive patients with endometriosis were treated with GIFT or IUI after COH between June 1990 and December 1998. Patients were divided into two groups. Group 1 (n = 97) included patients with stages 1 and 2 endometriosis, and group 2 (n = 30) included patients with stages 3 and 4 endometriosis. Laparoscopic conservative surgery for endometriosis was performed prior to IUI for patients in both group 1 and group 2. In group 1, 55 patients underwent 95 cycles of IUI after COH and 42 patients underwent 57 cycles of GIFT. In group 2, 14 patients underwent 16 cycles of IUI after COH, while 16 patients underwent 22 cycles of GIFT. The stimulation protocol for both GIFT and IUI was mid-luteal pituitary down-regulation with a gonadotropin releasing hormone agonist (GnRH-a) followed by gonadotropins. In group 1, the pregnancy rates (GIFT = 50.9%, IUI = 29.4%) and the delivery rates (GIFT = 28.1%, IUI = 14.7%) per cycle were significantly higher in GIFT compared to IUI (p = 0.009 and p = 0.05, respectively). There was no significant differences in the pregnancy rate (GIFT 69%, IUI 50.9%, respectively) or the delivery rate (GIFT 38.1%, IUI 25.5%) per patient. In group 2, there was no significant difference in the pregnancy rate (GIFT 54.5%, IUI 31.3%) or the delivery rate (GIFT 40.9%, IUI 12.5%) per cycle, but the difference in the pregnancy rate (GIFT 75%, IUI 35.7%) and the delivery rate (GIFT 56.3%, IUI 14.3%) per patient was significantly higher in GIFT compared to IUI (p = 0.04 and p = 0.02, respectively). We conclude that, when the same stimulation protocol is used in the early stages of endometriosis, a few cycles of IUI can achieve similar results to GIFT, and therefore should be used first. In advanced stages of endometriosis GIFT appears to be more effective.

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