Figure 1. Expected number of oocytes retrieved related to BMI and age women. A stepwise multiple linear regression, including only the first IVF / ICSI, showed a significant negative association between the number of oocytes retrieved and BMI (P <0.001, B = -0243, SE = 0.059) and age of women (P = 0.014 , B = -0179, SE = 0.073). Adapted from Pinborg et al., 2011.