Declercq Eugene, Belanoff Candice, Iverson Ronald
Community Health Sciences Department Boston University School of Public Health, 801 Massachusetts Ave., Boston, MA, 02118, USA.
Department of Obstetrics and Gynecology, Boston University School of Medicine, 72 E Concord St, Boston, MA, 02118, USA.
BMC Pregnancy Childbirth. 2020 Aug 12;20(1):458. doi: 10.1186/s12884-020-03137-x.
The rate of induction of labor in the U.S. has risen from 9.6% in 1990 to 25.7% in 2018, including 31.7% of first-time births. Recent studies that have examined inductions have been small qualitative studies or relied on either medical records or administrative data. This study examines induction from the perspective of those women who experienced it, with a particular focus on the prevalence and predictors of inductions for nonmedical indications, women's experience of pressure to induce labor and the relationship between the attempt to medically initiate labor and cesarean section.
Study data are drawn from the 2119 respondents to the Listening to Mothers in California survey who were planning to have a vaginal birth in 2016. Mothers were asked if there had been an attempt to medically initiate labor, if it actually started labor, if they felt pressured to have the induction, if they had a cesarean and the reason for the induction. Reasons for induction were classified as either medically indicated or elective.
Almost half (47%) of our respondents indicated an attempt was made to medically induce their labor, and 71% of those attempts initiated labor. More than a third of the attempts (37%) were elective. Attempted induction overall was most strongly associated with giving birth at 41+ weeks (aOR 3.28; 95% C.I. 2.21-4.87). Elective inductions were more likely among multiparous mothers and in pregnancies at 39 or 40 weeks. The perception of being pressured to have labor induced was related to higher levels of education, maternal preference for less medical intervention in birth, having an obstetrician compared to a midwife and gestational ages of 41+ weeks. Cesarean birth was more likely in the case of overall induction (aOR 1.51; 95% C.I. 1.11-2.07) and especially following a failed attempt at labor induction (aOR 4.50; 95% C.I. 2.93-6.90).
Clinicians counselling mothers concerning the need for labor induction should be aware of mothers' perceptions about birth and engage in true shared decision making in order to avoid the maternal perception of being pressured into labor induction.
美国引产率已从1990年的9.6%升至2018年的25.7%,其中初产妇引产率达31.7%。近期有关引产的研究多为小型定性研究,或依赖病历或行政数据。本研究从经历过引产的女性视角审视引产情况,特别关注非医学指征引产的发生率及预测因素、女性感受到的引产压力以及医学引产尝试与剖宫产之间的关系。
研究数据取自2016年参与加利福尼亚州“倾听母亲心声”调查的2119名计划经阴道分娩的受访者。询问母亲们是否有过医学引产尝试、引产是否实际发动、是否感到有引产压力、是否进行了剖宫产以及引产原因。引产原因分为医学指征性或选择性。
近半数(47%)受访者表示有过医学引产尝试,其中71%的尝试成功发动了分娩。超过三分之一(37%)的尝试是选择性引产。总体而言,引产尝试与41周及以上分娩关联最为紧密(调整后比值比3.28;95%置信区间2.21 - 4.87)。经产妇和妊娠39或40周时更易进行选择性引产。感到有引产压力与较高教育水平、产妇希望分娩时减少医疗干预、由产科医生而非助产士接生以及孕周41周及以上有关。总体引产情况下剖宫产可能性更大(调整后比值比1.51;95%置信区间1.11 - 2.07),尤其是引产尝试失败后(调整后比值比4.50;95%置信区间2.93 - 6.90)。
就引产必要性向母亲提供咨询的临床医生应了解母亲对分娩的看法,并进行真正的共同决策,以避免母亲感觉是被迫引产。