22nd August 2023

A 27-year-old woman presents to the antenatal clinic at 32 weeks with an ultrasound showing a low-lying placenta and vasa praevia

A 27-year-old woman presents to the antenatal clinic at 32 weeks with an ultrasound showing a low-lying placenta and vasa praevia. This is her first child. She has had no bleeding and reports that this pregnancy was conceived naturally.

What is her most significant risk factor for having developed vasa praevia?