Taylor and Francis Group, Journal of Obstetrics and Gynaecology, 2(36), p. 172-177
DOI: 10.3109/01443615.2015.1030730
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Using orthogonal design, we created a questionnaire containing 16 cases of twin pregnancies. For each case, respondents indicated whether they would plan a vaginal delivery (VD) or a caesarean section (CS). We assessed the association between each variable (maternal age, parity, mode of conception, gestational age, chorionicity, body mass index, foetal growth, foetal presentation and wish for additional children) and the planned mode of delivery. A VD was planned mostly for vertex presentation of twin A (vertex-vertex vs. non-vertex-vertex, odds ratio [OR]: 0.002, 95% confidence interval [CI]: 0.001-0.003, p