Abstract：
OBJECTIVE:The purpose of the current study was to evaluate the characteristics of vibroacoustic devices used for fetal stimulation. STUDY DESIGN:Intrauterine sound pressure levels over a frequency range of 40 to 5000 Hz were measured with hydrophones in anesthetized sheep. Stimulators included the AT&T (Martinsburg, W.V.) and Servox (Hearing Instruments, Piscataway, N.J.) artificial larynges, the Corometrics fetal acoustic stimulator (Wallingford, Conn.) and electric toothbrush. RESULTS:Intrauterine spectral patterns resulting from stimulation with the AT&T, Servox, and Corometrics devices were characterized by numerous high-level overtones above a fundamental frequency between 97 and 163 Hz. Fundamental frequencies recorded during toothbrush stimulation were 22 to 24 Hz with reduced but identifiable overtones up to 250 Hz. CONCLUSIONS:Fetal vibroacoustic stimulators that operate on the principle of the electronic artificial larynx produce very similar intrauterine sound pressure levels.
journal_name
Am J Obstet Gynecoljournal_title
American journal of obstetrics and gynecologyauthors
Abrams RM,Gerhardt KJ,Rosa C,Peters AJdoi
10.1016/0002-9378(95)90618-5subject
Has Abstractpub_date
1995-11-01 00:00:00pages
1372-6issue
5eissn
0002-9378issn
1097-6868pii
0002-9378(95)90618-5journal_volume
173pub_type
杂志文章abstract：:This article is from the "To The Point" series prepared by the Association of Professors of Gynecology and Obstetrics Undergraduate Medical Education Committee. The purpose of this review was to provide an overview of the importance of well-being in medical education. A literature search was performed by a Reference L...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/j.ajog.2019.05.012
更新日期：2019-12-01 00:00:00
abstract：OBJECTIVE:Gestational diabetes mellitus (GDM) is thought to modify the pattern of placental transcriptome. In a microarray study and a confirmatory quantitative real-time reverse transcription-polymerase chain reaction study, we investigated global placental gene expression in GDM. STUDY DESIGN:Ribonucleic acid was ex...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2008.08.022
更新日期：2009-02-01 00:00:00
abstract：OBJECTIVE:Our purpose was to examine the hypothesis that hysterectomy without adnexectomy after tubal interruption is associated with the development of hydrosalpinx. STUDY DESIGN:In this case-control study, patients with a pathologic diagnosis of hydrosalpinx were compared with a group of patients undergoing adnexect...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1067/mob.2002.130212
更新日期：2002-12-01 00:00:00
abstract：:In the conservative management of premature rupture of the membranes, most patients have oligohydramnios caused by continuous leakage of amniotic fluid. To avoid unfavorable effects of oligohydramnios on fetal development and well-being, we infused physiologic saline solution continuously into the amniotic cavity at a...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(89)90243-3
更新日期：1989-07-01 00:00:00
abstract：:In spite of the relative safety and medical advantages of vaginal birth after cesarean section, the procedure continues to be underutilized in the private practice setting. To evaluate the hypothesis that resistance by the patient often precludes a trial of labor, an observational study was conducted of all women with...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(91)91422-s
更新日期：1991-06-01 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：:Primiparous mice were fed alcohol in their drinking water as 0%, 10%, 15%, 20% (v/v) solutions on days 11 through 18 of gestation. Based on blood alcohol levels and on locomotor and health impairments, these treatment groups represent situations of mild, moderate, and severe alcohol abuse. There were significant alcoh...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(84)90028-0
更新日期：1984-07-01 00:00:00
abstract：OBJECTIVE:The objective of the study was to examine the effect of first-trimester obstetric ultrasound (OBUS) on the measurement of the effect of complications ascribed to postterm pregnancies. STUDY DESIGN:We conducted a retrospective cohort study of all term, singleton pregnancies delivered at our institution who ha...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2008.03.034
更新日期：2008-06-01 00:00:00
abstract：:Plasma cortisol levels were studied in the cord blood and neonatal blood of the following vaginally delivered groups: (A) postmature; (B) postterm (but not postmature); and (C) term neonates. Significantly lower levels of 8 A.M. neonatal plama cortisol were found in postmature neonates when compared with term neonates...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(75)90013-7
更新日期：1975-02-01 00:00:00
abstract：:Transferrin receptors have been identified on the villous trophoblast of normal chorionic villi by immunohistochemical techniques. The current study investigated the expression of transferrin receptors on molar chorionic villi by using a monoclonal antibody in immunofluorescence assays. The villous trophoblast of mola...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(85)90438-7
更新日期：1985-01-01 00:00:00
abstract：:Although the mortality rate after herpes simplex virus type 2 inoculation was not significantly different between pregnant mice and nonpregnant mice, systemic interferon production was very high during late pregnancy compared with that in nonpregnant mice. Antiviral activity was detected in placentas from all noninfec...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(85)80127-7
更新日期：1985-10-01 00:00:00
abstract：:The effects of various vasodilators on the uterine vascular bed were investigated in nonpregnant, oophorectomized sheep with chronically implanted flow probes and catheters inserted into branches of the uterine arteries. A 1 mug dose of estradiol-17beta (0.224 muM) produces a maximum uterine blood flow response after ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(76)90593-7
更新日期：1976-05-15 00:00:00
abstract：OBJECTIVE:Our purpose was to test the hypothesis that lipopolysaccharide potentiates the transcription of human placental prostaglandin H synthase-2 gene, a rate-limiting enzyme in prostaglandin synthesis. STUDY DESIGN:We transfected normal term cytotrophoblasts with a reporter vector containing either prostaglandin H...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(98)70422-3
更新日期：1998-03-01 00:00:00
abstract：OBJECTIVE:This study was designed to investigate the effects of estrogen alone or combined with two different progestins, norethindrone or norgestimate, on bone density and compressive mechanical properties in an aged rat model. STUDY DESIGN:Twenty 11-month-old female Sprague-Dawley rats were sham operated (intact con...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(95)90638-x
更新日期：1995-11-01 00:00:00
abstract：OBJECTIVE:The objective of the study was to characterize reports to the Vaccine Adverse Event Reporting System (VAERS) in pregnant women who received seasonal influenza vaccines to assess for potential vaccine safety concerns. STUDY DESIGN:We searched VAERS for reports of adverse events (AEs) in pregnant women who rec...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2010.08.050
更新日期：2011-02-01 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:Seventeen-alpha-hydroxyprogesterone caproate (17-OHPC) reduces recurrent preterm birth (PTB). We hypothesized that single nucleotide polymorphisms in the human progesterone receptor (PGR) affect response to 17-OHPC in the prevention of recurrent PTB. STUDY DESIGN:We conducted secondary analysis of a study of...
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.2011.03.048
更新日期：2011-08-01 00:00:00
abstract：:Cuba has a comprehensive National Health System which delivers primary and secondary health care to 100% of the population. Communicable disease control and preventive medicine programs are implemented through this System. The National Syphilis Control Program is described briefly as an example of a successful control...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(80)91112-6
更新日期：1980-12-01 00:00:00
abstract：BACKGROUND:Antecedents of chronic pelvic pain are not well characterized, but pelvic organ visceral sensitivity is a hallmark of these disorders. Recent studies have identified that some dysmenorrhea sufferers are much more likely to exhibit comorbid bladder hypersensitivity. Presumably, these otherwise healthy women m...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2019.12.010
更新日期：2020-06-01 00:00:00
abstract：:Placental pathology can be useful in a variety of ways including immediate diagnosis of important conditions affecting the mother or infant, identifying conditions that are likely to recur in subsequent pregnancies, separating clinical syndromes into distinct pathological phenotypes for further investigation, and unco...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/j.ajog.2015.05.056
更新日期：2015-10-01 00:00:00
abstract：:Since the milieu of pregnancy stimulates physiologic hyperprolactinemia, we questioned whether prolactin secreted during normal pregnancy contains a large-molecular weight component that binds to concanavalin A and whether this large-molecular weight prolactin contributes to the thyrotropin-releasing hormone (TRH)-rel...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1983-11-01 00:00:00
abstract：:An investigation was undertaken in an effort to learn whether the type of delivery or the pattern of labor progression has any lasting effect on the infant. Paired-data design was chosen to ensure that the comparisons between homogeneous groups would be valid. Our objective was to reduce potential bias based on unequa...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(84)90386-7
更新日期：1984-12-15 00:00:00
abstract：:We have undertaken a prospective analysis of the diagnostic significance of three different criteria of human sperm function including the conventional semen profile, measurements of hamster-oocyte fusion, and determinations of reactive oxygen species generation in 139 couples. The latter, who were characterized by a ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(11)80017-7
更新日期：1991-02-01 00:00:00
abstract：:The rate of cesarean delivery has become an important health care issue, and has attracted the attention of governments, professional organizations, health care administrators, clinicians, and patients. This has resulted in the generation of guidelines, clinical recommendations, and other documents aimed at increasing...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2016.04.021
更新日期：2016-10-01 00:00:00
abstract：:The current resolution of antenatal ultrasonography permits the sonologist to visualize and critically evaluate the cerebellum and cisterna magna. Abnormalities in the size and shape of these structures will assist the sonologist in the detection of the majority of central nervous system malformations. ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(91)90686-l
更新日期：1991-05-01 00:00:00
abstract：:The levels of unconjugated estriol in maternal vein serum during labor, cord artery serum, and cord vein serum were measured in normal pregnancy and in pregnancy complicated by intrauterine growth retardation. The mean level of unconjugated estriol in maternal vein serum was significantly lower in the intrauterine gro...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1977-01-01 00:00:00
abstract：:A case of a pelvic arteriovenous fistula is described 5 years after treatment of trophoblastic disease. Hypogastric embolization, rather than an operation, was used to obliterate the fistula. Pregnancy occurred 1 year later and a healthy infant was delivered. This is the first report of a delivery after angiographic m...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(85)90102-4
更新日期：1985-09-15 00:00:00
abstract：OBJECTIVE:The objective of the study was to determine whether single-nucleotide polymorphisms (SNPs) that influence the maternal innate immune response are associated with puerperal group A streptococcal sepsis. STUDY DESIGN:Subjects with confirmed puerperal group A streptococal infection were prospectively identified...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2010.01.006
更新日期：2010-03-01 00:00:00
abstract：:One hundred twenty preterm newborns less than 34 weeks' gestational age have been studied prospectively to determine the frequency of fetal and newborn metabolic acidosis and to examine the relationship of metabolic acidosis to periventricular leukomalacia as demonstrated by serial newborn ultrasonographic examination...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(90)91299-r
更新日期：1990-04-01 00:00:00
abstract：:Bicycle ergometry (non-weight-bearing exercise) and treadmill (weight-bearing exercise) were compared to assess physiologic responses to similar work loads. A total of 22 subjects at 29.3 +/- 1.6 (+/- SEM) weeks' gestation who performed non-weight-bearing exercise were compared with 15 similarly fit subjects at 26.1 +...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(89)90905-8
更新日期：1989-12-01 00:00:00
