European Journal of Obstetrics & Gynecology and Reproductive Biology European Journal of Obstetrics & Gynecology and Reproductive Biology, Elsevier, 2019, 242, pp.139-143. ⟨10.1016/j.ejogrb.2019.08.021⟩ European Journal of Obstetrics & Gynecology and Reproductive Biology, 2019, 242, pp.139-143. ⟨10.1016/j.ejogrb.2019.08.021⟩