Abstract：
OBJECTIVES:Our purpose was to record gestational age-specific data for third-stage duration of labor, frequencies of retained placentas (undelivered at 30 minutes), manual removal of the placenta, and hemorrhage. STUDY DESIGN:Included were 45,852 singleton deliveries > or = 20 weeks' gestation from 1984 to 1992. Odds ratios, 95% confidence intervals, and actuarial life analysis with censoring of cases with manual placenta removal were performed. RESULTS:The frequency of retained placentas (2.0% overall) was markedly increased among gestations < or = 26 weeks (odds ratio 20.8, 95% confidence interval 17.1 to 25.4) and < 37 weeks (odds ratio 3.0, 95% confidence interval 2.6 to 3.5) compared with term. The frequency of manual removal (3.0% overall) was increased among gestations < or = 26 weeks (odds ratio 9.2, 95% confidence interval 7.5 to 11.4) and < 37 weeks (odds ratio 2.8, 95% confidence interval 2.4 to 3.1) compared with term. Hemorrhage (3.5% overall) was increased among subjects with manual placenta removal (odds ratio 10.4, 95% confidence interval 9.1 to 11.9); hemorrhage was also increased among gestations < or = 26 weeks (odds ratio 3.0, 95% confidence interval 2.3 to 4.0) and < 37 weeks (odds ratio 1.2, 95% confidence interval 1.01 to 1.3) compared with term. The frequency of hemorrhage peaked by 40 minutes regardless of gestational age. Life-table analysis predicted 90% of placentas would spontaneously deliver by 180 minutes for gestations at 20 weeks, 21 minutes at 30 weeks, and 14 minutes at 40 weeks; the predicted frequency of retained placentas was 42% higher than the recorded incidence. CONCLUSIONS:The duration of the third stage decreases and the frequencies of hemorrhage and manual removal decrease with increasing gestational age. Hemorrhage was associated with manual placental removal. Life-table analysis indicated that manual removal of placentas shortened the duration of the third stage of labor, especially among preterm deliveries. A prospective trial is needed to determine whether manual placental removal can reduce hemorrhage among prolonged third stages.
journal_name
Am J Obstet Gynecoljournal_title
American journal of obstetrics and gynecologyauthors
Dombrowski MP,Bottoms SF,Saleh AA,Hurd WW,Romero Rdoi
10.1016/0002-9378(95)91493-5subject
Has Abstractpub_date
1995-04-01 00:00:00pages
1279-84issue
4 Pt 1eissn
0002-9378issn
1097-6868pii
0002-9378(95)91493-5journal_volume
172pub_type
杂志文章abstract：OBJECTIVE:Regulatory bodies and insurers evaluate hospital quality using obstetrical outcomes, however meaningful comparisons should take preexisting patient characteristics into account. Furthermore, if risk-adjusted outcomes are consistent within a hospital, fewer measures and resources would be needed to assess obst...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2013.07.019
更新日期：2013-11-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to compare the effect of a single 48-hour exposure to betamethasone or dexamethasone in the NCI-H441 cell line and in human type II pneumocytes. STUDY DESIGN:NCI-H441 cells were exposed 48 hours to varying concentrations of betamethasone or dexamethasone (10(-10) to 10(-7) mol/L...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2004.01.015
更新日期：2004-04-01 00:00:00
abstract：BACKGROUND:The incidence of placenta accreta spectrum is rising. Management is most commonly with cesarean hysterectomy. These deliveries often are complicated by massive hemorrhage, urinary tract injury, and admission to the intensive care unit. Up to 60% of patients require transfusion of ≥4 units of packed red blood...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2019.08.035
更新日期：2020-02-01 00:00:00
abstract：:The highest percentages of unintended pregnancies and the largest increases in births reported in the United States in recent years were in adolescents and in women more than 35 years of age. Increasing numbers of these women will require contraception to avoid unintended pregnancy. In adolescents the combined oral co...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/s0002-9378(12)90947-3
更新日期：1993-06-01 00:00:00
abstract：:Histologic and hormonal documentation of a luteinized unruptured follicle that occurred during a spontaneous menstrual cycle in a rhesus monkey is presented. Frequent (every 2 hours) blood sampling to assess midcycle hormonal dynamics in the monkey with the luteinized unruptured follicle and in five monkeys with an ov...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(86)90469-2
更新日期：1986-04-01 00:00:00
abstract：OBJECTIVES:Our goals were (1) to determine whether hypertension, proteinuria, and glomerular endotheliosis can be produced by chronic reduction of lower aortic pressure in pregnant rhesus monkeys and (2) to study the time course of the development of hypertension by means of longitudinal arterial blood pressure measure...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(93)90171-e
更新日期：1993-07-01 00:00:00
abstract：:A retrospective analysis of 29 cases of squamous cell neoplasia of the vagina following hysterectomy is presented. Two groups of patients were identified; the first presented following hysterectomy for cervical dysplasia or neoplasia on an average of 5.7 years later, and the second presented following hysterectomy for...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(81)90016-8
更新日期：1981-02-01 00:00:00
abstract：:Thirteen women, six of whom were using oral contraceptive agents, between the ages of 23 and 34 years, free from illness, and without a previous clinical history of menstrual abnormality, were studied with chronobiological methods for circadian (about 24 hour) patterns of metal and creatinine excretinine excretion. Ci...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(16)33342-7
更新日期：1976-04-01 00:00:00
abstract：OBJECTIVE:Women who develop certain common pregnancy complications have a greater chance of developing cardiovascular disease (CVD) later in life. However, most health care providers do not provide postpartum cardiovascular risk counselling or follow-up. The Maternal Health Clinic was established to address this gap in...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2013.12.001
更新日期：2014-05-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to determine whether quantification of cervicovaginal fluid fetal fibronectin (fFN) improves diagnostic accuracy of spontaneous preterm birth (sPTB) in symptomatic women. STUDY DESIGN:A prospective blinded predefined secondary analysis of a larger study of cervicovaginal fluid f...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2012.10.890
更新日期：2013-02-01 00:00:00
abstract：:As the American physician workforce matures in age, senior physicians on the active clinical staff may become vulnerable to diminished professional performance. Many physicians compensate by using experiential rather than analytic methods to effectively solve clinical problems. Surgical expertise also may be at risk i...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/j.ajog.2011.07.043
更新日期：2012-03-01 00:00:00
abstract：BACKGROUND:Clinically based anxiety questionnaires measure 2 forms of anxiety that are known as state anxiety and trait anxiety. State anxiety is temporary and is sensitive to change; trait anxiety is a generalized propensity to be anxious. OBJECTIVE:Our study aims to characterize the reasons for anxiety among women a...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2019.06.001
更新日期：2019-11-01 00:00:00
abstract：:Ritodrine hydrochloride was administered parenterally to pregnant ewes during spontaneous or oxytocin-induced uterine activity. The effects of ritodrine on the uterus and cardiovasculature were assessed both with and without simultaneous administration of either alpha or beta blockade. Ritodrine was found to be an eff...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(76)90692-x
更新日期：1976-12-15 00:00:00
abstract：:A retrospective chart review was performed on all patients undergoing trachelectomy in the Roanoke Valley between January 1, 1975 and April 30, 1987. During this period a total of 55 trachelectomies were performed. Fifty-three of the 55 trachelectomies (96%) were performed by the vaginal approach. Forty-seven of the 5...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(88)80042-5
更新日期：1988-09-01 00:00:00
abstract：:Deaths related to pregnancy were relatively common in the United States at the beginning of the twentieth century. A dramatic reduction of 99% in maternal mortality rate, from 850.0-7.5 per 100,000 live births from 1900-1982, is 1 of the most noteworthy public health success stories of the time period. This plateau co...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/j.ajog.2019.01.211
更新日期：2019-07-01 00:00:00
abstract：OBJECTIVES:Smoking is associated with a reduced risk of preeclampsia, but what is the outcome of pregnancy when preeclampsia develops in women who smoke? STUDY DESIGN:Single births in Sweden from 1987 through 1993 to nulliparous women aged 15 to 34 years (N = 317,652) were included. Poisson regression analyses were us...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(97)70455-1
更新日期：1997-07-01 00:00:00
abstract：:Current ultrasonographic techniques offer a novel approach for the identification of a wide variety of placental abnormalities usually described postnatally by the pathologist. Placental vascular lesions, placental tumors, and abnormal placentation are potentially associated with perinatal complications and their diag...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/0002-9378(90)90645-n
更新日期：1990-11-01 00:00:00
abstract：OBJECTIVE:Our purpose was to determine the frequency and safety of the use of epidural anesthesia and the correlation between bleeding time and maternal-neonatal bleeding complications in a group of pregnant women who participated in a multicenter trial of low-dose aspirin in pregnancy. STUDY DESIGN:Data regarding typ...
journal_title：American journal of obstetrics and gynecology
pub_type： 临床试验,杂志文章,多中心研究,随机对照试验
doi：10.1016/0002-9378(95)90495-6
更新日期：1995-05-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to compare clinical outcome and health related quality of life (HRQOL) 5 years after uterine artery embolization (UAE) or hysterectomy in the treatment of menorrhagia caused by uterine fibroids. STUDY DESIGN:Patients with symptomatic uterine fibroids who were eligible for hyster...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,多中心研究,随机对照试验
doi：10.1016/j.ajog.2010.01.049
更新日期：2010-08-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to assess self-reported side effects in women after they received the oral contraceptive (OC) and to compare discontinuation rates, according to presence or absence of side effects. STUDY DESIGN:The study comprised 1716 women aged <25 years who initiated the OC at 3 publicly fun...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,多中心研究,随机对照试验
doi：10.1016/j.ajog.2006.12.015
更新日期：2007-04-01 00:00:00
abstract：BACKGROUND:It is not well-characterized whether attempting operative vaginal delivery is a safe and effective alternative among women who undergo a trial of labor after cesarean delivery who are unable to complete second-stage labor with a spontaneous vaginal delivery. OBJECTIVE:The purpose of this study was to compar...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2017.01.013
更新日期：2017-04-01 00:00:00
abstract：OBJECTIVE:Studies in animals and human muscle have demonstrated differential splicing of the insulin-like growth factor-1 gene in response to mechanical strain and damage. We conducted a study on the expression of insulin-like growth factor-1 splice variants in the levator ani muscle after the first vaginal delivery. ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2004.12.088
更新日期：2005-07-01 00:00:00
abstract：:Although the importance of zinc nutrition during pregnancy has been well recognized, there have been few studies of zinc transport in maternal or fetal sera. We examined total serum zinc levels as well as zinc associated with its major transport proteins, albumin and alpha 2-macroglobulin, prospectively in 46 women du...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(84)90029-2
更新日期：1984-07-01 00:00:00
abstract：:A total of 1,755 fetal heart rate (FHR) tracings of the second stage of labor was analyzed. The FHR patterns were classified according to the behavior of the baseline FHR and are listed in decreasing order of benignity: normocardia, transitory bradycardia, tachycardia, persistent bradycardia, and progressive bradycard...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(81)90041-7
更新日期：1981-06-15 00:00:00
abstract：OBJECTIVE:The objective of the study was to assess the adherence to hormonal contraception (pill, patch, ring, or injectable) among women veterans and examine the relationships between race/ethnicity and the months of contraceptive supply dispensed with contraceptive adherence. STUDY DESIGN:We conducted a retrospectiv...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2013.03.024
更新日期：2013-08-01 00:00:00
abstract：:To study possible cellular antigonadotropic effects of danazol, monolayer cultures of anterior pituitary cells from immature female rats were treated with danazol. Measurements of luteinizing hormone release in response to 10(-8) mol/L gonadotropin-releasing hormone challenge and iodine 125-labeled gonadotropin-releas...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(86)90673-3
更新日期：1986-02-01 00:00:00
abstract：:Severe obstructive sleep apnea, a disturbance of sleep resulting from intermittent periodic obstruction of the upper airway, was diagnosed after cardiotocography during which the external tocodynamometer disclosed a pattern initially thought to represent uterine activity. In spite of this obstructive sleep apnea with ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(91)90354-t
更新日期：1991-11-01 00:00:00
abstract：:Sponsored by the nonprofit Berlex Foundation, this 6-day Faculty Development Course introduces small groups of new faculty to research design, critical appraisal of the literature, scientific writing, and evidence-based medicine. The course includes didactic presentations, small group discussions, and individual proto...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1067/mob.2000.107381
更新日期：2000-10-01 00:00:00
abstract：:This review concentrates on 2 consequences of cesarean deliveries that may occur in a subsequent pregnancy. They are the pathologically adherent placenta and the cesarean scar pregnancy. We explored their clinical and diagnostic as well as therapeutic similarities. We reviewed the literature concerning the occurrence ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/j.ajog.2012.03.007
更新日期：2012-07-01 00:00:00
abstract：:We studied the relationship of amniotic fluid bacterial inhibition in 50 patients with intra-amniotic infection to that in 50 matched control patients. Amniotic fluid was collected through a transcervical intrauterine catheter. All infected patients had clinical signs of intra-amniotic infection and greater than or eq...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(82)90004-7
更新日期：1982-08-01 00:00:00
