Zhongguo quanke yixue (Jun 2024)
A Retrospective Analysis on the Cesarean Section of Multiparous Women under the New Childbearing Policy Based on the Revised Robson Classification System
Abstract
Background Since the implementation of the "universal two-child" policy, multiparous women has become the main labor and delivery population. Problems such as advanced maternal age, chronic comorbidities, obstetric complications and pregnancy after cesarean section have become increasingly prominent, bringing new challenges to obstetricians. Objective To analyze the current status of cesarean section in multiparous women under the new childbearing policy based on the revised Robson classification system, in order to provide data support for rational control of cesarean section rate, improvement of obstetric care. Methods A total of 19 170 women who delivered by cesarean section in the Tenth Affiliated Hospital, Southern Medical University from 2017 to 2020 were included and divided into the primipara group (n=5 630) and multiparous group (n=13 540). Maternal information including age, gravity, parity, previous deliveries, fetal position, pregnancy comorbidities and complications, maternal and fetal outcomes, was collected through the electronic medical records. The general information and maternal and neonatal outcomes of the two groups were compared. The revised Robson classification system was used to classify the parturients according to their obstetric characteristics (parity, fetal position, number of fetuses and gestational weeks of delivery). The distribution of parturients in the revised Robson classification system and the change of the proportion of parturients in each group with year were compared. Results The proportion of pregnancy after cesarean section was as high as 81.4% (11 026/13 540). The age, gravity, parity, proportion of age ≥35 years and gestational diabetes mellitus of the multiparous group were higher than the primipara group (P<0.05). Based on the revised Robson classification system, R3 class (singleton cephalic position at ≥37 weeks' gestation with a history of at least 1 cesarean delivery) accounted for the highest proportion (50.4%, 9 668/19 170) in all cesarean section, followed by R1 class (singleton cephalic primiparous labor at≥37 weeks' gestation, spontaneous labor, induced labor, or cesarean section before labor) (20.8%, 3 993/19 170). In multiparous women, R3 class accounted for 71.4% (9 668/13 540). Analysis of the population characteristics of multiparous women found that the proportion of R3 class, which had the highest proportion, decreased from 73.5% to 67.1%, while the proportion of R2 class [transplants with singleton cephalic position at ≥37 weeks' gestation (without history of cesarean section), spontaneous labor, induced labor, or cesarean section before labor], and R8 class [all singleton cephalic positions at <37 weeks' gestation (including history of cesarean section) ] all increased. The 24-h postpartum hemorrhage and the proportion of blood transfusions were higher in the multiparous group than the primipara group, while length of hospital stay after surgery was lower than that in the primipara group (P<0.05). A total of 20 026 newborns were delivered by 19 170 women, including 6 077 primipara women and 13 949 multiparous women; the birth weight and 1-minute Apgar score of neonates in the multiparous group were higher than the primipara group, while the proportions of 1-minute ≤7 and neonatal transfers were lower than those in the primipara group (P<0.05). There was no significant difference in 5-minute Apgar score between the two groups (P>0.05) . Conclusion Advanced age and pregnancy after cesarean section are prominent features of multiparous women. Although the proportion of R3 class decreased by year, it is still the main population of cesarean section. In order to reduce cesarean section rate, it is necessary to effectively control the cesarean section of primipara women, and actively promote the vaginal trial of labor for women in R3 class. Meanwhile, the proportion of R2 and R8 in the multiparous women, which put forward new requirements for clinical practice of obstetrics.
Keywords
