Infants diagnosed with intrauterine growth restriction are at increased risk for brain injury in the neonatal period, and eventually increased risk for adverse long-term neurodevelopmental outcomes. This kind of growth restriction is often caused by long-term placental insufficiency leading to chronic lack of oxygen in the brain during development. Pomegranate juice is one of the highest polyphenol-containing dietary supplements commercially available. Previous studies have shown that pomegranate-derived polyphenols are potent neuroprotective antioxidants with no proven side effects. The investigators hypothesize that maternal dietary supplementation with pomegranate juice during the last trimester of pregnancy will reduce the effects of exogenous stimuli contributing to placental insufficiency, and will enhance brain growth and development in the IUGR population.

The current study seeks to investigate the impact of maternal dietary supplementation with pomegranate juice on placental morphology and on subsequent newborn brain development and function. A total of 99 consenting women carrying fetuses with a diagnosis of intrauterine growth restriction (IUGR) in the third trimester were randomized to one of two arms.

Treatment Group: Expecting mothers in this group will be randomized to consume 8oz of pomegranate juice daily. Participants will keep a daily diary documenting compliance with the regimen. Participants will continue daily intake until delivery.

Placebo group: Expecting mothers will be randomized to consume an 8oz of pomegranate free juice placebo that matches taste, calories, and appearance to regular pomegranate juice but lacks polyphenols. Participants will keep a diary of daily intake to help ensure compliance similar to the treatment group. Participants will continue to placebo until delivery.

Both groups: Maternal blood and urine samples will be collected prior to starting the juice regimen in order to establish baseline metabolite status. For the first 84 mothers enrolled, a fetal MRI was scheduled prior to beginning the juice regimen. Phase I participants will undergo two fetal echocardiograms: one before starting the juice regimen, and a second two weeks into the juice regimen to establish the safety of high polyphenol intake on fetal heart development. All women will be contacted on a weekly basis to assess compliance. At the time of delivery, maternal blood and urine, and cord blood will be collected and sent for analysis to test for the presence of dimethylellagic acid glucuronide (DMEAG) and urolithin A glucuronide (UAG), polyphenic components of pomegranate juice. Placental material will be sent for formal pathological exam.

If clinically stable, MRI will be undertaken without sedation at term equivalent (38-41 weeks CGA). Infants will undergo testing of cognitive, gross and fine motor, and speech skills at around 2 years of age.

Inclusion Criteria:

- Expecting mother with a fetal diagnosis of less than 5th percentile on the Doubilet fetal growth curve

Exclusion Criteria:

• Multiple congenital abnormalities
• Known fetal chromosomal disorder
• Maternal illicit drug or alcohol intake

Individual participant data (IPD) cannot be shared publicly because the investigators had not previously sought Institutional Review Board (IRB) approval for public sharing of participant data as part of the informed consent process. However, the investigators will gladly share with any investigator the de-identified minimal raw data set needed to replicate the study upon request.