Abstract: To investigate the practical application value of the mild-stimulation method used in in vitro fertilization and embryo transfer (IVF-ET) treatment for IVF patients with normal ovarian function. Methods：The patients (ages from 26 to 38 years) with normal ovarian function, who were treated with IVF-ET in Affiliated Reproductive Center of China Medical University from January 2004 to July 2012 were selected as our samples. We compared the clinical results of treatment between the mild-stimulation (104 cycles in experimental group) and the conventional stimulation (198 cycles in control group).Results: The number of retrieved oocytes (3.1±1.6 vs. 10.2±5.7, P<0.05) and clinical pregnancy rate ［34% (33/97) vs. 49.7% (93/187), P<0.05］ of the mild-stimulation group (104 cycles) were lower than those of the control group (198 cycles), however, the duration of stimulation (4.7±2.1 vs. 9.16±1.87) and total doses of 75 U gonadotropins used (5.7±3.7 vs. 30.9±10.3) were also lower in the mild-stimulation group than in the control group obviously (P<0.05).Conclusion: For the normal ovarian function patients, the mild-stimulation method has clear clinical effects, but not as good as the conventional-stimulation one.

Key words: Ovulation induction, Fertilization in vitro, Embryo transfer, Pregnancy rate