GAIA Level 2 First Trimester Spontaneous Abortion

**Semantic type:** Classification

**Definition:** GAIA Level 2 First Trimester Spontaneous Abortion is defined by three criteria: first, it does not qualify as a Level 1 First Trimester Spontaneous Abortion; second, at least one of the following three requirements must be met: a) Crown-rump length greater than 7 mm and no visible heartbeat, confirmed by transvaginal ultrasound; OR b) Crown-rump length greater than 15 mm and no visible heartbeat, confirmed by abdominal ultrasound; OR c) Mean gestational sac diameter is 25 mm or more and no visible embryo; third, gestational age is within the pre-defined range for the selected abortion definition as assessed by maternal and/or fetal parameters (Level 1-2) (using Brighton Preterm Birth Gestational Age algorithm).

**Synonyms:** - Global Alignment of Immunization safety Assessment in pregnancy Level 2 First Trimester Spontaneous Abortion - Level 2 First Trimester Spontaneous Abortion