Abstract：
:A transvaginal duplex Doppler ultrasonography system was used to measure blood flow characteristics in the ascending uterine artery before and during pregnancy. The system uses a 5 MHz Doppler transducer coupled to a 6.5 MHz imaging probe. There was a steady increase in volume flow rate in the left ascending uterine artery from a mean of 94.5 ml/min before pregnancy to a mean of 342 ml/min in late gestation (reflecting a 3.5-fold increase). With the assumption of equal flow on both uterine arteries, the fraction of the cardiac output that is distributed to these vessels was calculated to be 3.5% in early pregnancy and to reach 12% near term. The mean diameter of this vessel in the nonpregnant state was 1.6 mm, increasing to 3.7 mm toward term. The resistance to flow, expressed as the peak systolic to end-diastolic flow velocity ratio, declined from a mean of 5.3 in the nonpregnant state to a mean of 2.3 near term. These changes reflect the perpetual growth and development of the uteroplacental circulation, which provides the metabolic demands of the growing fetus throughout gestation.
journal_name
Am J Obstet Gynecoljournal_title
American journal of obstetrics and gynecologyauthors
Thaler I,Manor D,Itskovitz J,Rottem S,Levit N,Timor-Tritsch I,Brandes JMdoi
10.1016/0002-9378(90)90834-tsubject
Has Abstractpub_date
1990-01-01 00:00:00pages
121-5issue
1eissn
0002-9378issn
1097-6868pii
0002-9378(90)90834-Tjournal_volume
162pub_type
杂志文章abstract：OBJECTIVE:We examined the use, safety, and economic impact of same-day discharge for women undergoing laparoscopic hysterectomy. STUDY DESIGN:We identified women in the Perspective database who underwent laparoscopic hysterectomy from 2000 through 2010. Discharge was classified as same-day, 1 day, and ≥2 days. Multiva...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2012.09.014
更新日期：2012-11-01 00:00:00
abstract：:Six patients having different subtypes of von Willebrand's disease were followed up during eight complete pregnancies. Two additional pregnancies terminated in spontaneous abortions. Five pregnancies ended in cesarean section either because of obstetric problems (three) or electively (two) to avoid infant bleeding. Th...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(86)90290-5
更新日期：1986-09-01 00:00:00
abstract：OBJECTIVE:In response to post-Women's Health Initiative dialog regarding individualized hormone replacement therapy (HRT), this study evaluates cardiovascular and neuroendocrine effects of HRT versus placebo in postmenopausal women grouped according to time since menopause. STUDY DESIGN:Resting and stress blood pressu...
journal_title：American journal of obstetrics and gynecology
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1016/j.ajog.2003.09.045
更新日期：2004-04-01 00:00:00
abstract：:Samples of cervical tissue were obtained from women immediately following term delivery from spontaneous labor or oral PGE2-induced labor and from a small nunber of nonpregnant women in the reproductive years undergoing hysterectomy for benign gynecologic disease. The measured strips were placed in a well-oxygenated b...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(76)90278-7
更新日期：1976-09-15 00:00:00
abstract：:Rupture of the fetal-neonatal bladder that results in urinary ascites has rarely been reported in the literature. In this report we present the first case of spontaneous rupture of the fetal bladder in which the diagnosis was made prenatally by means of color Doppler ultrasonography. ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(93)90454-q
更新日期：1993-12-01 00:00:00
abstract：BACKGROUND:Use of more effective contraception may lead to less condom use and increased incidence of sexually transmitted infection. OBJECTIVE:The objective of this study was to compare changes in condom use and incidence of sexually transmitted infection acquisition among new initiators of long-acting reversible con...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2017.09.009
更新日期：2017-12-01 00:00:00
abstract：OBJECTIVE:The study was undertaken to explore the antiproliferative mechanism of action of 2-[piperidinoethoxyphenyl]-3-[4-hydroxyphenyl]-2H-benzo(b)pyran (K-1) in estradiol-induced rat uterine hyperplasia. STUDY DESIGN:Adult ovariectomized rats received vehicle or estradiol alone (20 μg/kg) or estradiol along with K-...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2011.05.024
更新日期：2011-10-01 00:00:00
abstract：:Prolactin levels in amniotic fluid during the third trimester of human pregnancy showed a wide range of values. There was no apparent correlation between amniotic fluid prolactin concentrations (AF PRL) and lecithin/sphingomyelin (L/S) ratios nor was there a prolactin concentration associated with a mature L/S ratio. ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(81)90321-5
更新日期：1981-02-15 00:00:00
abstract：:We report a case of placenta accreta that was managed conservatively by uterine arterial embolization and subsequently was complicated by hematuria. Ultrasound revealed a calcified mass at the posterior bladder wall. A careful resection under cystoscopy was carried out without hemorrhagic complication. Pathologic exam...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2009.08.040
更新日期：2009-11-01 00:00:00
abstract：:The natural history of genital herpes simplex virus (HSV) infections was investigated in 83 pregnancies in 78 women, and the information was used to determine the need for cesarean section in these women. We studied 163 recurrent episodes with HSV cultures from the cervix and from vulvar lesions every 1 to 3 days. Cer...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(83)90679-8
更新日期：1983-04-01 00:00:00
abstract：OBJECTIVE:Our objective was to study the prevalence of genital prolapse and possible related factors in a general population of women 20 to 59 years of age. STUDY DESIGN:Of 641 eligible women in a primary health care district, 487 (76%) answered a questionnaire and accepted an invitation to a gynecologic health examin...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(99)70203-6
更新日期：1999-02-01 00:00:00
abstract：OBJECTIVE:Our purpose was to demonstrate the clinical efficacy and effect of hormone replacement therapy in menopause on quality of life. STUDY DESIGN:A randomized, open, 6-month comparison of hormone replacement therapy (estradiol transdermal system [Estraderm TTS] plus chlormadinone) and symptomatic treatment (verap...
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/s0002-9378(94)70239-x
更新日期：1994-02-01 00:00:00
abstract：:Fifty-five patients with Stage IB adenocarcinoma of the cervix were treated by radical hysterectomy and pelvic lymphadenectomy from 1965 through 1985. Bleeding was the presenting symptom in 56% of the patients. Twenty patients underwent cone biopsy for diagnostic purposes and 70% had residual carcinoma at the time of ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(89)90877-6
更新日期：1989-06-01 00:00:00
abstract：:Two types of fibrous structures can be demonstrated in midcycle cervical mucus: (1) long, thick fibers that vary in diameter from 0.5 to 5 mum and run parallel to each other, and (2) microfibrils that vary in diameter from 500 to 1,500 A and form bundles or networks. The spaces in such networks usually measure from 8...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(75)90065-4
更新日期：1975-07-01 00:00:00
abstract：BACKGROUND:Transgender, nonbinary, and gender-expansive people who were assigned female or intersex at birth experience pregnancy and have abortions. Scarce data have been published on individual abortion experiences or preferences of this understudied population. OBJECTIVE:This study aimed to fill existing evidence g...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2020.09.035
更新日期：2020-09-25 00:00:00
abstract：OBJECTIVE:The purpose of this study was to compare how hospital rankings, based on risk-adjusted primary cesarean rates, change over time. STUDY DESIGN:Washington State Birth Events records data from 1995 through 1998 were used. Risk-adjustment models were built for each year. Risk-adjusted hospital rankings and outli...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2003.07.024
更新日期：2004-02-01 00:00:00
abstract：OBJECTIVE:There has been a gradual shift of the focus of prenatal diagnosis from genetics to ultrasonography. We assessed our primary genetics approach to determine what would be missed without the genetics component. STUDY DESIGN:We evaluated referral indications for patients with normal and abnormal prenatal finding...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(96)70230-2
更新日期：1996-06-01 00:00:00
abstract：:We investigated factors affecting the sex differential in neonatal mortality rate using linked birth and death certificates of more than 300,000 infants born in Georgia between 1974 and 1977. The neonatal mortality rate was higher in male infants than in female infants (relative risk = 1.23, p less than 10(-8)) and wa...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(85)90518-6
更新日期：1985-03-15 00:00:00
abstract：:The therapeutic effect of magnesium sulfate remains unknown. Its role as an anticonvulsant is controversial. The effect of pretreatment with parenteral magnesium sulfate on the ability to initiate penicillin-induced seizure foci in anesthetized cats was studied. All animals in the experimental group achieved serum mag...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(89)90482-1
更新日期：1989-02-01 00:00:00
abstract：:The possibility of controlling fertility by antibodies inactivating key reproductive hormones has been amply demonstrated by active and passive immunization in primates. Four birth control vaccines directed against human chorionic gonadotropin are currently in early clinical trials. The nature of these vaccines and th...
journal_title：American journal of obstetrics and gynecology
pub_type： 临床试验,杂志文章
doi：10.1016/s0002-9378(87)80135-7
更新日期：1987-10-01 00:00:00
abstract：:Defined as delivery at 34(0/7)-36(6/7) weeks, late preterm births have increased by 15% between 1992 and 2002 and currently they occur in about 8% of singletons and 35% of multiple gestations. Compared with newborns at 39 weeks, late preterm births undeniably have a significantly higher rate of morbidity (respiratory ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2011.02.076
更新日期：2011-06-01 00:00:00
abstract：:The placentas of five mothers with severe preeclampsia who gave birth to moderately growth-retarded term infants were compared to a group of placentas collected from mothers who had uncomplicated pregnancies and normal term infants who were appropriate for gestational age. This study demonstrated that, on a quantitati...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(85)80170-8
更新日期：1985-05-01 00:00:00
abstract：OBJECTIVE:We studied ovarian cancers for the expression of membrane markers of hematopoietic origin. STUDY DESIGN:We used flow cytometry to systematically characterize the expression of more than 30 hematologic antigens on ovarian carcinoma cell lines and to assess their stability under estrogen exposure. The expressi...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2009.05.013
更新日期：2009-08-01 00:00:00
abstract：:A letter is written in response to a report by Drs. Beric, Kupresanin, and Hulka (Am. J, Obslet Gynecol. 114: 273, 1972) which stated that the Karman catheter is not suitable for terminating pregnancies beyond Week 6 of pregnancy. The use of a Karman catheter in terminating pregnancies of 7-10 weeks resulted in 47% t...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(73)91070-3
更新日期：1973-05-15 00:00:00
abstract：OBJECTIVE:The purpose of this research was to test a widely publicized theory that nausea and vomiting of pregnancy protects women from ingesting certain vegetables and other foods that produce congenital anomalies and other adverse outcomes of pregnancy. STUDY DESIGN:The theory was tested with use of data on dietary ...
journal_title：American journal of obstetrics and gynecology
pub_type： 临床试验,杂志文章
doi：10.1016/s0002-9378(97)80032-4
更新日期：1997-01-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to estimate US rates of postpartum intrauterine device (IUD) insertion and postpartum tubal sterilization. STUDY DESIGN:Data from the 2001-2008 Nationwide Inpatient Sample were used to identify delivery hospitalizations with IUD insertion or tubal sterilization procedure codes. ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2011.08.004
更新日期：2012-02-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to determine the inhibitory effects of anti-interleukin-1beta and transforming growth factor-beta2 on the production of interleukin-1beta and prostaglandin E2 by human decidual cells. STUDY DESIGN:Decidual membranes were obtained from 30 patients between 37 and 40 weeks' gestati...
journal_title：American journal of obstetrics and gynecology
pub_type： 临床试验,杂志文章
doi：10.1016/s0002-9378(98)70265-0
更新日期：1998-07-01 00:00:00
abstract：:Smoking increases the risk of lung cancer and cardiovascular disease among persons of both sexes. The risk of cardiovascular disease is further increased among users of oral contraceptives who smoke, particularly those who are >/=35 years old or carry the coagulation factor V Leiden mutation. Other important cardiovas...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/s0002-9378(99)70695-2
更新日期：1999-06-01 00:00:00
abstract：:Women who experienced severe primary dysmenorrhea had 90 to 120 minutes of continuous uterine pressure monitoring during their peak period of discomfort. During the initial screening cycle, they were given 40 mg of piroxicam, a nonsteroidal anti-inflammatory drug which inhibits prostaglandin synthesis. The pressure tr...
journal_title：American journal of obstetrics and gynecology
pub_type： 临床试验,杂志文章
doi：10.1016/0002-9378(83)90865-7
更新日期：1983-04-15 00:00:00
abstract：OBJECTIVE:The purpose of this study was to determine the effect of an obstetrics patient safety program on staff safety culture. STUDY DESIGN:We implemented (1) obstetrics patient safety nurse, (2) protocol-based standardization of practice, (3) crew resource management training, (4) oversight by a patient safety comm...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2010.11.004
更新日期：2011-03-01 00:00:00
