GAIA Level 1 Placenta Previa

**Semantic type:** Classification

**Definition:** GAIA Level 1 Placenta Previa is defined by a second or third trimester ultrasound (and/or MRI) that demonstrates evidence of placental tissue overlying or abutting the internal cervical os.

**Synonyms:** - Global Alignment of Immunization safety Assessment in pregnancy Level 1 Placenta Previa - Level 1 Placenta Previa