Abstract：
:A previous study reported frequent resistance of the cervix at 9 mm during dilation and interpreted the resistance as the beginning of a tear of the internal os. A more recent identical study did not indicate such tears. Measurement of the dilators revealed that the set used in the previous study had uneven increments in diameter with a wide variation between size 25 and size 27 dilators. Increments of newer dilators are more even, and newer dilators reveal a more even progression of cervical resistance with increasing diameter. :Resistance of the cervix during dilation by Pratt dilators was measured directly as force over time, during local anesthesia, comparing dilators made by Dittmar and Penn Corp., Cheltenham, PA. to those made recently by Pilling Co, Fort Washington, PA. Data for the Dittmar dilators were taken from a study published in 1973, which showed an abrupt peak in resistance at Pratt dilator No. 27. Data for the Cheltenham dilators, collected from 16 nulliparas and 15 parous women, showed a continuous increase in resistance. The set of dilators used in 1973 were measured with calipers and uneven progression in diameter was verified for the No. 27 instrument. Thus the former conclusion of a physiologic resistance of the cervix at 9 mm was retracted.
journal_name
Am J Obstet Gynecoljournal_title
American journal of obstetrics and gynecologyauthors
Hulka JFdoi
10.1016/s0002-9378(88)80157-1subject
Has Abstractpub_date
1988-10-01 00:00:00pages
871-3issue
4eissn
0002-9378issn
1097-6868pii
S0002-9378(88)80157-1journal_volume
159pub_type
杂志文章abstract：OBJECTIVE:We sought to investigate the incidence of hip and proximal lower extremity pain following transobturator midurethral sling and evaluate the association between pain and body mass index (BMI). STUDY DESIGN:This was a retrospective cohort study of all transobturator midurethral sling procedures from July 2008 ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2010.07.023
更新日期：2010-11-01 00:00:00
abstract：:Follicular fluid samples were obtained by puncturing follicles of ovaries in situ from patients undergoing laparotomy. Sodium, potassium, chloride, magnesium, calcium, phosphorus, and sulfur concentrations measured by electron probe microanalysis were similar to those of blood, with minimal differences. This suggested...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(77)90690-1
更新日期：1977-05-15 00:00:00
abstract：OBJECTIVE:We sought to determine whether small-for-gestational age (SGA) and large-for-gestational age (LGA) birthweights increase autism risk. STUDY DESIGN:This was a retrospective cohort analysis comparing children with autism (n = 20,206) within a birth cohort (n = 5,979,605). Stratification by sex and birthweight ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2012.01.044
更新日期：2012-04-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to summarize recent evidence regarding infection-associated preterm birth and to make appropriate recommendations. Antepartum treatment of lower genital tract infection or bacterial colonization has been found to reduce the incidence of preterm birth in the case of asymptomatic b...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2004.03.014
更新日期：2004-06-01 00:00:00
abstract：:Color Doppler imaging could easily and rapidly detect the absence of an umbilical artery, despite the presence of oligohydramnios in one case and multiple cord loops involving a normal cord in the other case. In the third case, which on gray-scale imaging appeared as an indeterminate cystic structure of the cord, colo...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(89)90663-7
更新日期：1989-11-01 00:00:00
abstract：OBJECTIVE:Various tocolytics are used to suppress uterine contractility in patients in preterm labor. Progesterone (P4) is used in patients at high risk for preterm delivery. In this study, we evaluated the effects of various tocolytics with and without P4 to examine effects on uterine contractility. STUDY DESIGN:Uter...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2011.12.011
更新日期：2012-03-01 00:00:00
abstract：:The addition of ovine prolactin (oPRL) to the fetal side of human term amnion in vitro is associated with a decrease in membrane permeability to tritiated water (THO). As the concentration of oPRL is increased from 2.5 to 20.0 micrograms per milliliter, permeability is progressively impaired. The addition of a specifi...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1979-02-15 00:00:00
abstract：OBJECTIVE:Our purpose was to examine the immunohistochemical properties of epithelial cells in peritoneal fluid and to compare the staining characteristics with cells of endometrium, menstrual effluent, peritoneum, and endometriotic lesions. STUDY DESIGN:Samples of menstrual effluent, endometrium, and peritoneal fluid...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(95)90283-x
更新日期：1995-08-01 00:00:00
abstract：:The daily symptom records of 150 untreated women with a convincing history of the premenstrual syndrome were investigated qualitatively and quantitatively by means of time series analysis in the form of Trigg's technique for trends. Symptoms were monitored with use of a modified menstrual distress questionnaire. Analy...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(86)90808-2
更新日期：1986-08-01 00:00:00
abstract：:In 16 normal pregnancies the relationship between the blood flow velocity waveform and fetal behavioral states at 37 to 38 weeks' gestation was studied. Whereas behavioral state independency was established for the acceleration time, peak flow velocity demonstrated a statistically significant reduction during active s...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(89)90448-1
更新日期：1989-02-01 00:00:00
abstract：OBJECTIVE:Human trophoblast proteolytic activity is believed to have implications for early implantation events and maintenance of chorionic structural integrity later in gestation. Abnormal release of chorion-derived extracellular matrix proteins such as fibronectin may identify patients at risk for preterm labor and ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(97)80012-9
更新日期：1997-01-01 00:00:00
abstract：OBJECTIVE:To investigate steroidogenesis in eutopic and ectopic endometrial tissues in adenomyosis. STUDY DESIGN:Aromatase and estrone sulfatase activities were determined by anion-exchange resin column chromatography, thin-layer chromatography, and cocrystallization. The effects of danazol on the activity of these en...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(93)90654-2
更新日期：1993-09-01 00:00:00
abstract：:The progesterone antagonist onapristone was used in guinea pigs during late pregnancy (43 +/- 2 days after coitus) and before term (day 61 after coitus) to investigate the role of progesterone on uterine reactivity to exogenous oxytocin, concentration of oxytocin receptors, and gap junctions in the myometrium. Onapris...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(91)90030-u
更新日期：1991-12-01 00:00:00
abstract：:To assess the effect of endogenous human atrial natriuretic peptide on the vascular system in preeclampsia, the circadian variations of plasma human atrial natriuretic peptide, cyclic guanosine 3'5'-monophosphate, cyclic adenosine 3'5'-monophosphate, and blood pressure were measured. In severe preeclamptic women, the ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(89)90110-5
更新日期：1989-01-01 00:00:00
abstract：OBJECTIVE:To evaluate the screening accuracy of pregnancy hypertensive disorders by maternal serum biomarkers and uterine artery Doppler in the first trimester. STUDY DESIGN:Prospectively enrolled nulliparous women had uterine artery Doppler and serum measured at 11-13 weeks. Maternal characteristics, uterine artery D...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2010.06.014
更新日期：2010-10-01 00:00:00
abstract：OBJECTIVE:To evaluate the risk of adverse perinatal outcomes among pregnant women previously hospitalized for bipolar disorder. STUDY DESIGN:We completed a population-based cohort study of women with a singleton delivery in Ontario, Canada (2003 to 2011). Women previously hospitalized for bipolar disorder (n = 1859) o...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2014.10.020
更新日期：2015-03-01 00:00:00
abstract：OBJECTIVE:We sought to evaluate inadequate gestational weight gain and fetal growth among overweight and obese women. STUDY DESIGN:We conducted an analysis of prospective singleton term pregnancies in which 1053 overweight and obese women gained >5 kg (14.4 ± 6.2 kg) or 188 who either lost or gained ≤5 kg (1.1 ± 4.4 k...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2014.02.004
更新日期：2014-08-01 00:00:00
abstract：OBJECTIVE:To test the hypothesis that amniotic fluid volume is increased in aquaporin 1 knockout mice. STUDY DESIGN:Transgenic mice deficient in aquaporin 1 protein were generated by targeted gene disruption, as described previously. After a cesarean section was performed, intact, individual gestational sacs were remo...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2005.02.046
更新日期：2005-06-01 00:00:00
abstract：OBJECTIVE:Fetal plasma angiotensin II levels are 10 times the levels found in adults. Despite these high levels, central injection of angiotensin II may stimulate fetal swallowing and increase fetal arterial blood pressure. We postulated that the high rate of spontaneous fetal swallowing and normal fetal pressor regula...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1067/mob.2001.117310
更新日期：2001-10-01 00:00:00
abstract：:Large ovarian cysts are conventionally treated by laparotomy. We describe a technique of transabdominal drainage under ultrasonographic control followed by laparoscopic excision of an ovarian cyst that was 24 x 10 x 20 cm. This approach has the benefits of minimal-access surgery and is suitable for unilocular benign c...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(96)70060-1
更新日期：1996-11-01 00:00:00
abstract：:The practice of gynecological surgery is being reshaped by commercial interests that are promoting the use of trochar-and-mesh surgical kits for the treatment of stress incontinence and pelvic organ prolapse. In this article, we review the recent history of these surgical innovations and discuss the implications of ch...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2009.05.031
更新日期：2010-01-01 00:00:00
abstract：:In this series of gonadoblastomas it appeared that the germ cells were the motivating force underlying either tumor proliferation or regression. The ultrastructural morphology confirmed the presence of undifferentiated gonadal cells with active steroid synthesis by the interstitial cells. The Call-Exner-like bodies wh...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(76)90359-8
更新日期：1976-06-15 00:00:00
abstract：BACKGROUND:The American Heart Association's formal characterization of cardiovascular health combines several metrics in a health-oriented, rather than disease-oriented, framework. Although cardiovascular health assessment during pregnancy has been recommended, its significance for pregnancy outcomes is unknown. OBJEC...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2020.07.053
更新日期：2020-08-05 00:00:00
abstract：OBJECTIVE:Our purpose was to determine whether umbilical cord acid-base values might be used to differentiate abruptio placentae from cord prolapse. STUDY DESIGN:By use of a retrospective study design, umbilical cord blood acid-base values of 32 cases of severely acidotic acute abruptio placentae were statistically co...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(97)70187-x
更新日期：1997-08-01 00:00:00
abstract：:In normal and diabetic pregnancies, the placenta functions as a complex endocrine gland that modulates all classes of maternal nutrients to the fetus. The metabolic alterations of normal pregnancy are diabetogenic and associated with modest resistance to endogenous insulin. Pregnant women with carbohydrate intolerance...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/0002-9378(83)90822-0
更新日期：1983-06-15 00:00:00
abstract：:This report describes the development of a measure of low-risk cesarean delivery by the Society for Maternal-Fetal Medicine (SMFM). Safely lowering the cesarean delivery rate is a priority for maternity care clinicians and health care delivery systems. Therefore, hospital quality assurance programs are increasingly tr...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2015.10.935
更新日期：2016-02-01 00:00:00
abstract：OBJECTIVE:Laparoscopically assisted vaginal hysterectomy (LAVH), which usually involves the use of an intrauterine manipulator for optimal surgical control, has been shown to be as effective and safe as conventional total abdominal hysterectomy (TAH) for the staging of endometrial carcinoma. The purpose of this study w...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2012.10.009
更新日期：2013-01-01 00:00:00
abstract：OBJECTIVE:Our purpose was to evaluate in a sheep model for endoscopic fetal surgery the impact of nitrous oxide-gas amniodistention compared with fluid amniodistention on duration of surgery, hemorrhagic events, and fetomaternal acid-base status. STUDY DESIGN:Pregnant ewes (n = 16) at 92 to 104 days of gestation (term...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1067/mob.2002.120482
更新日期：2002-03-01 00:00:00
abstract：:Current concepts of the pathogenesis of preeclampsia involve the generalized dysfunction of maternal vascular endothelial cells. We measured the endothelial isoform of fibronectin as a marker of endothelial cell injury throughout pregnancy in a prospective, case-control study. Nineteen women met strict criteria for th...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(91)90435-t
更新日期：1991-10-01 00:00:00
abstract：OBJECTIVE:Absent end-diastolic blood flow in the umbilical artery identifies growth-restricted fetuses at high risk of perinatal mortality and severe morbidity. We explored antenatal variables predictive of perinatal mortality or severe neonatal morbidity in such fetuses. STUDY DESIGN:We accessed a cohort of 39 single...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2005.07.032
更新日期：2005-09-01 00:00:00
