European Journal of Obstetrics & Gynecology and Reproductive Biology European Journal of Obstetrics & Gynecology and Reproductive Biology, Elsevier, 2017, 212, pp.166-170. ⟨10.1016/j.ejogrb.2017.01.060⟩ European Journal of Obstetrics & Gynecology and Reproductive Biology, 2017, 212, pp.166-170. ⟨10.1016/j.ejogrb.2017.01.060⟩