Presentation
Primigravida referred for a growth scan.
Patient Data
Age: 25 years
Gender: Female
From the case:
Vasa previa
Longitudinal

The placenta is posterior low lying without covering internal os of the cervix. The umbilical cord is inserted anteriorly. The cord extends within chorio-amniotic membranes from anterior to posterior to reach the placenta and while doing so; it passes across internal cervical os.
Case Discussion
Second trimenter scan in a primigravida female show velamentous cord insertion and vasa previa.