caa a22 4500 475811798 CHVBK 20180406123801.0 cr unu---uuuuu 170329e20000301xx s 000 0 eng 10.1007/s001920050074 doi (NATIONALLICENCE)springer-10.1007/s001920050074 Relationship Between the Length of the Perineum and Position of the Anus and Vaginal Delivery in Primigravidae [Elektronische Daten] [D. E. E. Rizk, L. Thomas] Abstract:: The aim of the study was to determine perineal length and anal position in primigravidae and to evaluate their effect on vaginal delivery. The distances between the fourchette and each of the center of the anal orifice and the inferior margin of the coccyx were measured in 212 primigravidae with singleton term pregnancies during the first stage of labor. Anal position index was calculated by dividing the first measurement by the second. The mean ± SD length of perineum was 4.6 ± 0.9 cm. The mean ± SD anal position index was 0.49 ± 0.12. Women with a short perineum (<4 cm) or a small anal position index (<0.42) had significantly higher rates of episiotomy, perineal tears and instrumented delivery. This association was also significant by multiple logistic regression analysis. It was concluded that a short perineum and anterior displacement of the anus were associated with traumatic vaginal delivery in primigravidae. Springer-Verlag London Limited, 2000 Key words:Anal position - Ectopic anus - Length - Perineum - Primigravidae - Vaginal delivery nationallicence Rizk D. E. E. United Arab Emirates University, Al-Ain, United Arab Emirates, AE aut Thomas L. United Arab Emirates University, Al-Ain, United Arab Emirates, AE aut https://doi.org/10.1007/s001920050074 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s001920050074 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rizk D. E. E. United Arab Emirates University, Al-Ain, United Arab Emirates, AE aut NATIONALLICENCE 700 1- Thomas L. United Arab Emirates University, Al-Ain, United Arab Emirates, AE aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer