Abstract：
OBJECTIVE:The purpose of this study was to examine lengths of first and second stages of labor across maternal age groups to determine whether different norms should be established. STUDY DESIGN:We conducted a retrospective cohort study of all laboring, term, singleton, and cephalic deliveries at a single institution between 1980-2001. Median lengths of labor were compared among 6 maternal age groups. Statistical comparisons were made using Kruskal-Wallis and Wilcoxon rank sum tests. Multivariable linear and logistic regression models were performed. RESULTS:Among 31,976 births, length of labor differed significantly by maternal age for both nulliparous and multiparous women. Younger nulliparous women (age, <20 yrs) had a shorter median second stage by up to 97 minutes (P < .001) than older nulliparous women (age, >39 yrs). After we controlled for potential confounders, we found that older women had a persistently higher likelihood of experiencing longer labor and prolonged labor than younger women. CONCLUSION:Length of labor and prolonged labor increases with increasing maternal age.
journal_name
Am J Obstet Gynecoljournal_title
American journal of obstetrics and gynecologyauthors
Greenberg MB,Cheng YW,Sullivan M,Norton ME,Hopkins LM,Caughey ABdoi
10.1016/j.ajog.2007.06.058subject
Has Abstractpub_date
2007-10-01 00:00:00pages
428.e1-7issue
4eissn
0002-9378issn
1097-6868pii
S0002-9378(07)00834-4journal_volume
197pub_type
杂志文章abstract：:Steroid contraception was developed in the late 1950s and introduced into use in the early 1960s. It soon became apparent that estroprogestational agents had adverse systemic effects, mainly on the cardiovascular and blood coagulation system. During the 1970s, new contraceptive agents were developed that contained 3...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(16)32475-9
更新日期：1982-03-15 00:00:00
abstract：OBJECTIVE:This study examined the effects of the chemopreventive agents 4-(N-hydroxyphenyl)retinamide (4-HPR) and alpha-difluoromethylornithine (DFMO) on leiomyoma growth. STUDY DESIGN:Primary cultures of human uterine leiomyomas and matched normal myometrium were established from hysterectomy specimens. After treatme...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2003.09.048
更新日期：2004-03-01 00:00:00
abstract：OBJECTIVES:We analyzed the safety and patient acceptance of amniotic fluid insulin measurements by third-trimester amniocentesis in women with gestational diabetes mellitus. STUDY DESIGN:We studied the rate of early uterine contractions, need for tocolysis, premature rupture of membranes, mode of delivery, length of g...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(98)70221-2
更新日期：1998-10-01 00:00:00
abstract：OBJECTIVE:Our purpose was to investigate changes with gestation in fetal plasma interferon gamma concentration. STUDY DESIGN:A cross-sectional study at the Harris Birthright Research Centre for Fetal Medicine, London, was performed. Enzyme-linked immunoassay was used to measure plasma concentration in 54 fetal blood s...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(11)90774-1
更新日期：1993-05-01 00:00:00
abstract：:Amnion and human amnion-derived WISH cells release CA 125 antigen into culture medium. CA 125 output was higher in WISH cells than in amnion cells. In this study we showed that release of the antigen is regulated, with both amnion and WISH cells responding in a similar manner to the tested agents. Release of CA 125 de...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(91)90713-2
更新日期：1991-05-01 00:00:00
abstract：:A patient with preexisting multiple endocrine neoplasia type IIA had normal 24-hour urinary metanephrine and vanillylmandelic acid excretions before and during pregnancy. After a benign prenatal course, the patient had a term spontaneous vaginal delivery. Multiple endocrine neoplasia type IIA antedating pregnancy may ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(97)70217-5
更新日期：1997-08-01 00:00:00
abstract：:Between April 1982 and April 1986, 91 patients underwent hysteroscopy for treatment of septate uteri. In 88 patients simultaneous laparoscopy was performed and one patient had a simultaneous laparotomy. Ninety procedures were performed on an outpatient basis with the patients under general anesthesia. The septum was i...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(87)90339-5
更新日期：1987-04-01 00:00:00
abstract：:Reanalysis of data on the ovulation method of natural family planning collected by the World Health Organization yields the following conclusions. The method is effective during perfect (correct and consistent) use, with a first-year probability of failure of 3.4%. However, it is extremely unforgiving of imperfect use...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(11)90581-x
更新日期：1991-12-01 00:00:00
abstract：:The rates of maternal morbidity and mortality in the United States demand a comprehensive approach to assessing pregnancy-related risks. Numerous medical and nonmedical factors contribute to maternal morbidity and mortality. Reducing the number of women who experience pregnancy morbidity requires identifying which wom...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2020.12.006
更新日期：2020-12-09 00:00:00
abstract：:Swan-Ganz catheterization was performed in 15 postpartum women who presented with severe pregnancy-induced hypertension at a mean gestational age of 31.5 weeks. The mean arterial pressure on presentation was 137.6 torr (range, 116 to 167 torr), and it remained at approximately 115 torr for the next 72 hours. Serial pu...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(84)90750-6
更新日期：1984-03-01 00:00:00
abstract：OBJECTIVE:Our objective was to evaluate women with clinical signs or chemical evidence of androgen excess by corticotropin stimulation testing. STUDY DESIGN:Seventy-six women with evidence of androgen excess were evaluated by corticotropin stimulation testing. Results were examined by plasma levels of dehydroepiandros...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(11)91406-9
更新日期：1992-08-01 00:00:00
abstract：:Thirteen healthy postmenopausal volunteers were studied under basal conditions and at intervals (days 1, 5, 10, and 30) after intravaginal placement of a polysiloxane ring impregnated with 400 mg of estradiol. Mean serum estradiol concentrations rose 26-fold with a twofold increase in serum estrone concentrations. Ser...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(86)90821-5
更新日期：1986-08-01 00:00:00
abstract：OBJECTIVE:Our purpose was to determine the proportion of pregnancy loss after genetic amniocentesis that is related to preexisting subclinical intrauterine inflammation. STUDY DESIGN:We accessed our bank of stored second-trimester amniotic fluid and maternal serum samples obtained from women undergoing genetic amnioce...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(96)80007-x
更新日期：1996-10-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to assess whether endometrial polyps (EMPs) represent cancer precursors. STUDY DESIGN:Age standardized incidence ratios (SIRs) of histologically verified endometrial cancers (EmCas) were estimated in women with EMPs and in women with uterine leiomyomata, which is a condition tha...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2010.03.036
更新日期：2010-09-01 00:00:00
abstract：:Fetal active and quiet periods of behavioral activity were determined at 28 and 32 weeks' and 36 to 40 weeks' gestational age in insulin-dependent diabetic pregnancies and in normal pregnancies resulting in infants with weights appropriate for gestational age. Fetal active and quiet periods were based on observations ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(82)90652-4
更新日期：1982-05-15 00:00:00
abstract：OBJECTIVE:Women in the postpartum period are at high risk for complications from influenza. Pharmacokinetic data of oseltamivir phosphate in postpartum women, however, are lacking. STUDY DESIGN:Seven healthy patients within 48 hours of delivery were recruited. Each woman received 75 mg of oseltamivir phosphate. Plasma...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2011.01.056
更新日期：2011-06-01 00:00:00
abstract：:In many developing countries, services to prevent the mother-to-child transmission (PMTCT) of human immunodeficiency virus (HIV) operate with limited contact with HIV care and treatment programs, despite significant advances in the accessibility of both services. There is a need to deliver more complex multidrug PMTCT...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/j.ajog.2007.03.068
更新日期：2007-09-01 00:00:00
abstract：OBJECTIVE:The arcus tendineous fasciae pelvis (ATFP) provides support to the anterior vagina. The objective of this study was to determine the impact of menopause on the structural components of the ATFP. STUDY DESIGN:Biopsy specimens of the ATFP were obtained from 10 premenopausal, 5 postmenopausal, and 12 postmenopa...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2003.08.040
更新日期：2004-03-01 00:00:00
abstract：OBJECTIVE:Our aim was to determine the accuracy of cervical length and funneling of the internal os in the prediction of the spontaneous very preterm birth of twin pregnancies. STUDY DESIGN:In a prospective study at 13 centers, routine transvaginal ultrasound scanning was used to examine 251 women with twin pregnancie...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,多中心研究
doi：10.1067/mob.2002.127380
更新日期：2002-12-01 00:00:00
abstract：:Compliance difficulties are more common among oral contraceptive users than is generally appreciated. Inconsistent use and method discontinuation are estimated to account for approximately 20% of the annual 3.5 million annual unintended pregnancies in the United States. In the past research focused on adolescents, for...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(99)70718-0
更新日期：1999-02-01 00:00:00
abstract：BACKGROUND:One of the controversies in the management of twin gestations relates to mode of delivery, especially when the second twin is in a nonvertex presentation (Vertex/nonVertex pairs) and birth is imminent at extremely low gestation. OBJECTIVE:We hypothesized that, for Vertex/nonVertex twins born before 28 weeks...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2020.12.002
更新日期：2020-12-09 00:00:00
abstract：OBJECTIVE:Our purpose was to study the effects of long-term treatment with magnesium sulfate on hypoxic-ischemic brain damage in newborn rats. STUDY DESIGN:Seven-day-old rat pups (n = 120) were exposed to unilateral carotid artery ligation and 2 hours of hypoxia (8% oxygen in 92% nitrogen). Neuronal loss was evaluated...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1067/mob.2001.108343
更新日期：2001-01-01 00:00:00
abstract：OBJECTIVE:Although an association between subclinical intrauterine infection and preterm birth is well established, there is conflicting evidence regarding the benefits of antibiotic administration to women in preterm labor with intact membranes. We attempted to determine the effect of ampicillin-amoxicillin and erythr...
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(93)90003-2
更新日期：1993-10-01 00:00:00
abstract：:Twelve cases of retroperitoneal mucinous cystadenoma or mucinous cystadenocarcinoma in women have been reported in the literature. We report an additional case. The histogenesis of mucinous cystadenomas and mucinous cystadenocarcinomas in the retroperitoneum is not clear, but that these lesions may arise from teratoma...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(89)90201-9
更新日期：1989-05-01 00:00:00
abstract：BACKGROUND:In contemporary practice many nulliparous women require intervention during childbirth such as operative vaginal delivery or cesarean delivery (CD). Despite the knowledge that the increasing rate of CD is associated with increasing maternal age, obesity and larger infant birthweight, we lack a reliable metho...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,多中心研究
doi：10.1016/j.ajog.2017.02.017
更新日期：2017-06-01 00:00:00
abstract：OBJECTIVE:A controversy exists regarding the time to monitor blood glucose in the diabetic pregnancy (60 or 120 minutes after meals). Using a novel approach that provides continuous measurement of blood glucose, we sought to determine postprandial glucose profile in the diabetic pregnancy. STUDY DESIGN:Subjects were c...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2004.01.055
更新日期：2004-08-01 00:00:00
abstract：:Based upon the experience gained in the evaluation of 60 patients with abnormal polytomography and/or elevated prolactin levels, the following observations can be made: Patients with amenorrhea, amenorrhea and galactorrhea, galactorrhea alone, or anovulatory cycles and infertility may or may not have pituitary tumors....
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(79)90816-0
更新日期：1979-12-01 00:00:00
abstract：:Between January 1988 and June 1990, 161 cases of open spina bifida were identified by the California Maternal Serum alpha-Fetoprotein Screening Program. Eight percent of these cases were not diagnosed by an initial ultrasonographic evaluation. Three defects were not recognized until birth. Ultrasonography is inadequat...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(92)91598-5
更新日期：1992-05-01 00:00:00
abstract：OBJECTIVE:Our goal was to improve the accuracy of estimating fetal weights among macrosomic fetuses with the traditional measurements of abdominal circumference, femur length, and head circumference. STUDY DESIGN:We used 4831 cases without anomalies from an ultrasonography laboratory database with an estimated fetal w...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,meta分析
doi：10.1067/mob.2000.106853
更新日期：2000-06-01 00:00:00
abstract：BACKGROUND:Most early preterm births are associated with intraamniotic infection and inflammation, which can lead to systemic inflammation in the fetus. The fetal inflammatory response syndrome describes elevations in the fetal interleukin-6 level, which is a marker for inflammation and fetal organ injury. An understan...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2018.01.009
更新日期：2018-04-01 00:00:00
