European Journal of Obstetrics & Gynecology and Reproductive Biology European Journal of Obstetrics & Gynecology and Reproductive Biology, Elsevier, 2021, 256, pp.57-62. ⟨10.1016/j.ejogrb.2020.06.029⟩ European journal of obstetrics and gynecology and reproductive biology European Journal of Obstetrics & Gynecology and Reproductive Biology, 2021, 256, pp.57-62. ⟨10.1016/j.ejogrb.2020.06.029⟩