Objective: Pentraxin (PTX)-3 is an inflammatory molecule that may be increased in the first trimester in pregnancies with subsequent preeclampsia. We measured first-trimester serum PTX-3 and correlated levels with maternal/placental factors related to placental development.
Study Design: Prospectively enrolled women had ultrasound, physical examination, and blood draw at 11-14 weeks. PTX-3 determined by enzyme-linked immunosorbent assay was related to maternal age, parity, race, body mass index (BMI), mean arterial blood pressure (MAP), smoking/caffeine, and uterine/umbilical artery Doppler pulsatility index (PI).
Results: In 111 patients PTX-3 levels ranged from 0.2-13.8 ng/mL. Spearman correlation between PTX-3 and gestational age (rho = 0.096), maternal age (rho = -0.049), BMI (rho = -0.07), MAP (rho = -0.085), mean uterine artery PI (rho = 0.150), and umbilical artery PI (rho = -0.021) was nonsignificant (all P > .05). Similarly, PTX-3 distribution was unaffected by smoking/caffeine use, BMI >30, MAP >100 mm Hg, or uterine artery notching (P > .05 for all).
Conclusion: First-trimester PTX-3 is unrelated to maternal characteristics and placental Doppler.
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