Understanding Lab Tests for Low Birth Weight
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Low birth weight, defined as a baby weighing less than 5 pounds 8 ounces (2,500 grams) at birth, is determined by weighing the newborn after delivery. There is no blood test to diagnose low birth weight itself; however, lab testing during pregnancy is fundamental for identifying risk factors and infections that may contribute to this condition.
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Trichomonas vaginalis RNA, Qualitative, TMA (Female)
This test detects Trichomonas vaginalis infection in pregnant women. Research shows that newborns from mothers with this infection have a higher risk of low birth weight. Early detection allows for appropriate treatment during pregnancy to reduce this risk and support optimal fetal growth.
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Why Blood Testing Matters During Pregnancy
Various maternal infections and health conditions can increase the risk of delivering a low birth weight baby. Blood and other laboratory tests are essential for detecting these risk factors early, allowing healthcare providers to implement preventive measures and appropriate treatments to support healthy fetal development.
Prevention and Management
Identifying and treating maternal infections during pregnancy is crucial for reducing the risk of low birth weight. Regular prenatal testing helps healthcare providers monitor maternal health and take proactive steps to ensure the best possible outcomes for both mother and baby.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment during pregnancy.
