Blood Test Developed to Predict Spontaneous Preterm Birth admin Posted on 8 years ago Study finds proteins found in blood samples at the end of the first trimester may predict preterm births before 35 weeks gestation, including among first-time mothers. Post navigation Previous: Older Biologic Age Linked to Elevated Breast Cancer RiskNext: Vitamin D May Protect Against Pollution-associated Asthma Symptoms in Obese Children