1 文献题目: 2 Summary 2.1 Results 1 文献题目: Noninvasive blood tests for fetal development predict gestational age and preterm delivery 2 Summary Noninvasive blood tests that provide information about fetal development and gestational age could potentially improve prenatal care. Ultrasound, the current gold standard, is not always affordable in low-resource settings and does not predict spontaneous preterm birth, a leading cause of