Nuchal CordUmbilical CordNeckHead and Neck NeoplasmsSpinal CordUltrasonography, PrenatalUltrasonography, Doppler, ColorObstetric Labor ComplicationsPregnancy Trimester, ThirdSpinal Cord InjuriesNeck PainPregnancyPregnancy Trimester, FirstPregnancy OutcomeGestational AgeNeck InjuriesPredictive Value of TestsSensitivity and SpecificityFemoral Neck Fractures