fetus echography female 8 human 8 Female 5 fetus 5 pregnancy 5 Humans 4 Pregnancy 4 gestational age 4 pregnant woman 4 Article 3 adult 3 article 3 clinical article 3 diagnostic imaging 3 newborn 3 Fetus 2 Prenatal ultrasound 2 Ultrasonography, Prenatal 2 age 2 awareness 2 case report 2 controlled study 2 echography 2 laboratory test 2 male 2 neonatal intensive care unit 2 practice guideline 2 prenatal diagnosis 2 retrospective study 2