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First trimester ultrasound

Multiple Pregnancy


* Mean diameter = ( length + height + width ) / 3

Corpus luteum
Gestational sac
Yolk sac
Crown-rump length
Nuchal translucency


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Fetal heartbeat

Multiple Pregnancy


Fetal heart rate


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Fetal biometry

Multiple Pregnancy


Crown-heel length
Biparietal diameter
Occipitofrontal diameter
Cephalic index
Head circumference
Abdominal circumference
Anteroposterior abdominal diameter
Transverse abdominal diameter
Femur length
Tibia length
Fibula length
Foot length
Humerus length
Ulna length
Radius length
Nasal bone length
Nuchal translucency


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Placenta. Amniotic fluid.

Multiple Pregnancy


Placental thickness
Placental grade
Amniotic fluid index