Typically SD is heralded by the classic “turtle sign”: after the fetal head is delivered, it retracts back tightly against the maternal perineum (4). In order to objectively define SD, Spong and colleagues (5) proposed defining shoulder dystocia as a ʻʻprolonged head-to-body delivery time (eg, more than 60 seconds) and/or the necessitated use of ancillary obstetric maneuversʼʼ. The 60-second interval was selected because, in their study, it was approximately two standard deviations above the mean value for head-to-body time for uncomplicated deliveries. Despite this recommendation, SD remains an entity without a clear definition (6).