Authors' Contributions
blood loss, hypotension
ADVERSE REACTIONS, BLOOD LOSS
Conception and design of the research was done by WSL, ZJ, and CJ. Acquisition of data was done by ZJ, SY, ZF, and CJ. Analysis and interpretation of the data were done by ZJ, SY, and WQF. Statistical analysis was done by ZJ, SY, and WSL. ZJ and SY wrote the manuscript. Critical revision of the manuscript for the intellectual content was done by WSL. Jin Zhang and Jun Chen contributed equally to this study.Comparison of additional NE cases, atropine intervention cases, and incidence of hypotension in the four maternal groups. Group Additional NE measurement in four maternal groups. Group Comparison of adverse reactions in the four maternal groups. Group Comparison of maternal age, gestational age, body mass index, blood loss, and fluid infusion.Group Comparison of umbilical cord drive and venous blood gas values among four groups of fetuses.Group Comparison of the incidence of maternal hypotension, the dose of additional NE, and the number of atropine and NE intervention cases.Compared with Comparison of the number of adverse reactions among the four groups of parturients.Compared with group 