Clinical Research Directory

Inclusion Criteria: * Age ≥18 years * Nulliparous (no previous births ≥20wk GA) * Single viable fetus at the dating ultrasound scan with an ultrasound estimated gestational age of 10 0/7-17 6/7 weeks of gestation * Ability to consent and comply with study procedures and follow-up Exclusion Criteria: * Multiple gestation * Inability to provide blood * Known fetal chromosomal abnormalities or structural Anomaly (a structural or functional defect with the following three characteristics: 1) of prenatal origin; 2) present at the time of live birth or fetal demise, or in utero; 3) affecting (or has the propensity to affect) the health, survival, or physical or cognitive functioning of the individual * Known or anticipated inability to complete study follow-up through delivery at the study site (e.g., planned relocation, transfer of obstetric care to a non-participating institution, or other circumstances making delivery outcome data unavailable) * Current or recent (within two months) participation in an interventional clinical study.