The purpose of this research study is to study the use of an ultrasound measurement system (USCOM) for patients with newly diagnosed fetal growth restriction (FGR). This system uses a technology to measure how much blood is being pumped in and out of the heart, which is important for understanding the heart's function in relation to pregnancy.

Inclusion Criteria:

• Pregnant patients with a new diagnosis of fetal growth restriction (estimated fetal weight <10th percentile or abdominal circumference <10th percentile) in the third trimester (gestational age >27w6d)

Exclusion Criteria:

• Multiple gestation
• Fetal anomalies
• Gestational diabetes or pregestational diabetes.

Patients with newly diagnosed fetal growth restriction at greater than 27 weeks 6 days' gestation will be eligible to enroll in this study.

All of the individual participant data collected during the trial, after deidentification.

Immediately following publication. No end date.

Researchers who provide a methodologically sound proposal. Any purpose. Proposals should be directed to Nicola.tavella@mssm.edu. To gain access, data requestors will need to sign a data access agreement.