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Ultrasound measurement of the perineum-fetal head distance as a predictive factor of difficult vaginal operative delivery

Sananes, NP; Kasbaoui, S; Severac, F; Gaudineau, A; Aissi, G; Favre, R; Langer, B

AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY, 2017; 216 (1): S69

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