CALCINTERV22: Calculations of results presented in Table 2.

BOMBINTERV Calculations for a Figure which has been removed from the final manuscript (after advices of reviewers. Figure shown in this file. EXPLORE INTERVALLESDOC: Calculations on maternal ages and BMI. INTERVAL: Calculations of results presented in Table 1. INTERVAL30: Preliminary results number of women by different parities 1-2-3etc….INTERVAL30B: Intervals between pregnancies by different parities 1-2-3etc…. comparisons between cases and controls presented also in Table 2. PRIMIPAT24: Complementary calculations of results presented in Table 1. LOGISTIC PAGE 1-2-3: Logistic regression results (Table 3). (RAR)