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Comparison of pregnancy dating by last menstrual period, ultrasound scanning, and their combination

Pregnancy DatingInfertilityFertilityReproductive HealthUltrasound ScanningGynecologyMaternal HealthObstetricsPrenatal DiagnosisLast Menstrual PeriodMenstrual CycleUltrasoundPublic HealthMedicineIntrapartum UltrasoundWomen's HealthHigh-risk Pregnancy