What Is a CRL in Pregnancy?


Crown-rump length in pregnancy (CRL) is the measurement of the length of a human foetus. It measures the length of the foetus from the top of the crown (head) to the rump (buttocks). It is determined from ultrasound imagery and is used to approximate gestational age.
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Community Reference Laboratory (Dorset, UK)
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Pregnancy Learning Center
You feel sick but happy. You're tired but excited about the future. Your body is changing and your moods are volatile. You are pregnant. Are you ready? Learn about what's happening to you and your baby at the Pregnancy Learning Center.
Source: healthline.com
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