Quantification of active fetal body movement in the first half of pregnancy.
D005260:Female; D005333:Fetus / Q000502:physiology*; D006801:Humans; D009068:Movement; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011262:Pregnancy Trimester, Second; D011296:Prenatal Diagnosis / Q000295:instrumentation; D014465:Ultrasonics / Q000295:instrumentation; D014463:Ultrasonography