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Recent reports investigating the value of basal inhibin B determination as a predictor of ovarian reserve and assisted reproduction treatment have led to discordant results. This study was undertaken to further assess the relative power of day 3 inhibin B and follicle stimulating hormone (FSH) (defined before treatment) and the woman's age both as single and combined predictors of ovarian response and pregnancy in an in-vitro fertilization (IVF)/intracytoplasmic sperm injection (ICSI) programme. A total of 120 women undergoing their first cycle of IVF or ICSI was included. Forty consecutive cycles cancelled because of poor follicular response were initially selected. As a control group, the nearest completed IVF/ICSI cycles before and after each cancelled cycle (i.e. the closest cycles in temporal relationship to the index cycle) were used. Mean age and basal FSH concentrations were significantly higher in the cancelled than in the control group (P: &lt; 0.01 and P: &lt; 0.001 respectively), whereas basal inhibin B was significantly higher in the latter (P: &lt; 0.05). The association of basal FSH (with an accuracy or predictive value of ovarian response of 79%) with cancellation rate was significant, independent of, and stronger than the effects of age and inhibin B (P: &lt; 0.05). Any two or all three of these variables studied did not improve the predictive value of FSH alone. Woman's age was the only variable independently associated with pregnancy rate. It is concluded that the stronger predictors of success in patients undergoing their first IVF/ICSI treatment cycle are age and basal FSH rather than inhibin B. Basal FSH concentration was a better predictor of cancellation rate than age, but age was a stronger predictor of pregnancy rate.

Day 3 serum inhibin B and FSH and age as predictors of assisted reproduction treatment outcome