We excluded women with clinical chorioamnionitis, fetal structural and chromosomal abnormalities, prior antenatal steroid exposure, and steroid use for other indications.

• 我们排除了患有绒毛膜羊膜炎，胎儿结构和染色体畸形，出生前有类固醇接触及有使用类固醇征候的妇女。