Women's Refusal to Participate in a Randomized Trial Involving First-trimester Screening for Pre-eclampsia: Factors Associated With Refusal and Reasons for Acceptance and Refusal

The main objective is to assess whether there are factors associated with women's refusal to participate in a randomized clinical trial involving first-trimester screening for pre-eclampsia. The secondary objective is to qualitatively evaluate the reasons for acceptance and refusal to participate.

1. Determine the acceptance/refusal rate among all women identified, eligible and offered RCT. 2. Comparison of demographic characteristics between the two groups * Group 1: women accepting to participate in RCT * Group 2: women refusing to participate in RCT 3. Assessment of motivations for acceptance (based on questionnaire given to women who agree to participate) 4. Evaluation of reasons for refusal to participate - obstacles (based on the questionnaire given to women who refuse to participate).