[Effect of pelvic inflammatory disease grades on in vitro fertilization-embryo transfer outcome]

To evaluate the effect of different grades of pelvic inflammatory disease (PID) and of salpingectomy on outcomes of in vitro fertilization-embryo transfer (IVF-ET).

Two hundred and twenty three cycles of IVF-ET were divided into three groups, including mild group, moderate group and severe group, according to different grades of sequelae of PID finding in exploratory operations before IVF. Patients in each group were divided into two subgroups according to receiving salpingectomy or not. The data of total dose of gonadotrophin (Gn), oocyte number, low response rate, fertilization rate, good embryo number and pregnancy rate were analysed between three groups and the two subgroups of each group, respectively.

All parameters were related to PID grades except fertilization rate. The total dose of Gn, oocyte number, good embryo number, low response rate and pregnancy rate were (2057 +/- 503) IU/L, (16 +/- 6), (6.0 +/- 4.3), 4.2%, 63.9% in mild group; (2204 +/- 603) IU/L, (12 +/- 6), (4.5 +/- 3.5), 13.9%, 46.8% in moderate group; and (2372 +/- 1018) IU/L, (9 +/- 6), (3.1 +/- 2.9), 33.8%, 41.2% in severe group. The total dose of Gn and low response rate increased with the aggravation of the grades of PID (P < 0.05). The oocyte number, good embryo number and pregnancy rate also had significant differences between three groups (P < 0.01, P < 0.01, P < 0.05, respectively). In mild and severe groups, the salpingectomy had no contribution to the outcome of IVF-ET treatment. In moderate group, patients receiving salpingectomy had more oocytes and good embryos and higher pregnancy rate than the others who retained oviducts (P < 0.05).

Grades of PID have an adverse effect on IVF-ET outcomes. Receiving salpingectomy or not should be based on different grades of PID, but operations of ovary-free should be performed in all patients.