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| The effect of the second stage duration based on the new mode of labor on maternal and infant outcomes |
| Cangzhou People's Hospital, Hebei Province, 061000 |
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Abstract Objective: To explore the effect of the second stage duration based on the new mode of labor on maternal and infant outcomes. Methods: 210 primiparas were divided in study group (150 primiparas with the second stage of labor≥2h) and control group (60 primiparas with the second stage of labor <2h) from March 2016 to July 2018. The primiparas in the study group were also divided in group A (59 primiparas with the second stage of labor 2-2.5h), group B (50 primiparas with the second stage of labor 2.5-3h), and group C (41 primiparas with the second stage of labor ≥3h). The rates of cesarean section and obstetric intervention, the incidences of maternal adverse outcomes, such as postpartum hemorrhage and postpartum fever, the incidences of neonatal adverse outcomes, such as asphyxia and hospitalization of were recorded and compared among these groups. Results: There were no significant difference in the rates of cesarean section, obstetric midwifery, maternal and neonatal adverse outcomes between group A and the control group (P>0.05). The rates of cesarean section, artificial rupture and oxytocin used, and the incidences of postpartum hemorrhage, postpartum fever and postpartum urinary retention of primiparas in group B and group C were significant higher than those of primiparas in control group (P<0.05). The rates of poor wound healing and lateral episiotomy of primiparas in group C were significant higher than those of primiparas in the control group (P<0.05). The incidence of macrosomia of primiparas in the B group was higher than that of primiparas in control group (P<0.05). The incidences of neonatal asphyxia, hospitalization, macrosomia, and low Apgar score, and value of abnormal umbilical artery blood pH in group C were significant higher than those in control group (P<0.05). Conclusion: Appropriate prolongation of the duration of the second stage of labor based on the new labor pattern can reduce the cesarean section rate of primiparas and doesn't increase the adverse outcomes of mother and neonate. However, the cesarean section rate, and the incidence of maternal postpartum hemorrhage and fever will increase when the second stage of labor over 2.5h, and the incidence of adverse outcomes such as neonatal asphyxia will increase when the second stage of labor over 3h.
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