The Effect of CPAP on Maternal and Infant Outcomes in Pregnant Women With OSAS

The goal of this clinical trial is to learn about the impact of CPAP on the maternal and infant outcomes of women with obstructive sleep apnea syndrome. The main questions aim to answer are: \[question 1\]Explore the impact of different CPAP treatment times on the maternal and infant outcomes of pregnant women with combined OSAS; \[question 2\]Explore the effects of CPAP on placental weight and birth weight/placental weight ratio in OSAS pregnant women. The CPAP treatment group received standardized CPAP treatment and routine prenatal care, while the non CPAP treatment group and non OSAS group only received routine prenatal care.