ABSTRACT
Women undergoing donor insemination (DI) are usually regularly ovulating, therefore the role of ovulation induction in this modality of treatment has been controversial. Some recent studies reported higher pregnancy rates in stimulated cycles in comparison with natural cycles. We employed a sequential step-up protocol in which treatment was started in a natural cycle, continued with a clomiphene citrate-stimulated cycle, and finished with an ovulation induction cycle. The patients were allowed three attempts at each step before moving to the next if conception did not occur. The aim of this protocol was to enhance the cost-effectiveness of the DI programme by increasing the cycle fecundability. A total of 101 patients underwent 216 cycles of DI, including 44 patients in 80 natural cycles, 38 patients in 89 CC-stimulated cycles, and 19 patients in 47 ovulation induction cycles. The clinical pregnancy rate per started cycle (CPR/C) and per patient during this period was 14% and 30% respectively. The pregnancy rates per started cycle and per patient in the natural, CC-stimulated and ovulation induction cycles were: 13 and 32%, 10 and 18%, and 21 and 53% respectively. There was no significant difference in the CPR/C in the three groups; however, the CPR per patient in the induced ovulation cycles was significantly higher than in the CC-stimulated cycles (P = 0.005). Only one patient during this period had a multiple pregnancy in the ovulation induction group, giving an overall multiple pregnancy of 3%. By using this treatment strategy, we achieved a high clinical pregnancy rate, a low multiple pregnancy rate and a low cost of treatment per pregnancy.
