Unconditional and conditional logistic regression analysis of the number of oocytes retrieved.

1Unconditional logistic regression model with only the number of oocytes retrieved included.2Conditional logistic regression model with the number of oocytes retrieved included, stratified by the number of good-quality embryos transferred and the number of embryos transferred.3Conditional logistic regression model with the number of oocytes included, stratified by the number of good-quality embryos transferred and the number of embryos transferred and maternal age (ap-value for testing overall effects of number of oocytes retrieved.