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Suspecting twins? When will you know?

Talk to your doctor about any Braxton Hicks contractions you may be experiencing. The mean CRL of singleton fetuses conceived by IVF was larger by 2. Products and Services Free Pregnancy App — Expert knowledge at your fingertips! This is one of the first signs of a pregnancy. Get Your Health newsletters Sign up. Neonatal outcome, complication and management of multiple births. Doppler Ultrasonography The fetal heart can be heard using Doppler ultrasound by 10 to 12 weeks in most patients [10].