According to the SEGO (Spanish Society of Gynecology and Obstetrics) along with other gynecological societies worldwide, the first regulated or official ultrasound of pregnancy should be done between 12 and 14 weeks, at which time the correct dating of the pregnancy is performed, to see if the growth that is observed in the ultrasound coincides with that which marks the date of the last menstrual period. In addition, a first study of fetal morphology is performed and very important ultrasound markers such as the nuchal fold are measured, which combined with other analytical tests (PAPPA and BHCG) allow estimating the statistical risk of genetic disease such as Down Syndrome or Edwards' Syndrome.
When should the first ultrasound of pregnancy be performed?
By Lydia Pilar Suárez M.D., M.Sc. (gynecologist).
Last Update: 02/16/2022
Lydia Pilar Suárez
Bachelor degree in Medicine and Surgery at the Universidad de Oviedo in Asturias. Specialization in Obstetrics and Gynecology at the University Hospital of San Carlos de Madrid. Master in Assisted Reproduction at the University of Rey Juan Carlos in collaboration with the Valencian Fertility Clinic IVI.
Licence number: 64136