Dating/viability scan
This is usually the first scan done after pregnancy is suspected. It is essentially to confirm the presence of a fetus(es) within the uterus and expected date of delivery. The scan can detect fetal heart activity from six weeks gestation by vaginal scan, and from eight to nine weeks by abdominal scan, while accurate dating can be obtained from measurements of the gestational sac and the ‘crown to rump’ length of the embryo.
