Multiple gestation can also be detected on ultrasound during the first trimester screening. The first trimester screening also confirms the accuracy of the pregnancy dates.
First Trimester Screening
First Trimester screening is carried out to help identify increased risks of Down syndrome and other foetal abnormalities in a foetus, particularly for older women who have higher risks of such pregnancies. First trimester screening is a prenatal screening test performed at 11-14 weeks. Prenatal screening in the first trimester requires an ultrasound and blood test.