释义 |
rule of outlet rule of out·letan obstetric rule for determining whether the pelvic outlet will permit the passage of a fetus; the sum of the posterior sagittal diameter and the transverse diameter of the outlet must equal at least 15 cm if a normal sized baby is to pass.rule of out·let (rūl owt'lĕt) An obstetric determination of whether the pelvic outlet will permit the passage of a fetus; the sum of the posterior sagittal diameter and the transverse diameter of the outlet must equal at least 15 cm if a normal-sized baby is to pass. |