Abstract：
OBJECTIVE:This study determined whether attenuated preovulatory luteinizing hormone surges in aging rats are associated with a decrease in pituitary luteinizing hormone content or luteinizing hormone beta-messenger ribonucleic acid expression on proestrus. STUDY DESIGN:Blood samples were taken every 90 minutes from 1:30 to 10:30 PM on proestrus in young (n = 8) and middle-aged (n = 12), regularly cyclic rats for plasma luteinizing hormone determination. On the next proestrus at 12 noon, rats were killed and the pituitaries were removed for luteinizing hormone content determination by radioimmunoassay and luteinizing hormone beta-messenger ribonucleic acid expression by dot blot analysis. Results were analyzed by one-way analysis of variance. RESULTS:Seven of the middle-aged rats had attenuated luteinizing hormone surges while the remaining five females had surges similar to those of young rats. On the next proestrus, all rats had similar quantities of pituitary luteinizing hormone. However, luteinizing hormone beta-messenger ribonucleic acid expression in middle-aged rats with attenuated luteinizing hormone surges was lower (p less than 0.05) than that of middle-aged and young rats with normal surges. CONCLUSION:Decreased luteinizing hormone beta-messenger ribonucleic acid expression, but not pituitary luteinizing hormone content at 12 noon on proestrus is correlated with attenuated luteinizing hormone surges in middle-aged rats.
journal_name
Am J Obstet Gynecoljournal_title
American journal of obstetrics and gynecologyauthors
Hogg BB,Matt DW,Sayles TEdoi
10.1016/s0002-9378(11)91405-7subject
Has Abstractpub_date
1992-08-01 00:00:00pages
303-7issue
2eissn
0002-9378issn
1097-6868pii
S0002-9378(11)91405-7journal_volume
167pub_type
杂志文章abstract：:A brief review of the evidence for and against the 12-week gestational age limit for abortion by curettage is reported. Existing data suggest that second trimester evacuation abortion is associated with higher morbidity and mortality rates than first trimester suction curettage, but with lower rates than second trime...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(78)90925-0
更新日期：1978-09-15 00:00:00
abstract：OBJECTIVE:The objective of the study was to test the hypothesis that factors circulating in the plasma of pregnant women and women with preeclampsia activate monocytes. STUDY DESIGN:Blood samples were taken from patients with early-onset severe preeclampsia (n = 9), healthy pregnant women (n = 9), and healthy nonpregn...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2007.12.013
更新日期：2008-07-01 00:00:00
abstract：:Epidermal inclusion cysts are a late complication of female genital circumcision, which is a practice that affects 125 million women primarily from Africa and the Middle East. A 30-year-old woman, gravida 4, para 1, presented to our clinic with an 8-year history of a slowly enlarging periclitoral mass. The patient had...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2016.03.026
更新日期：2016-06-01 00:00:00
abstract：OBJECTIVE:We studied the role of multidrug resistance proteins in regulating transplacental transmission of corticosteroids and protease inhibitors. STUDY DESIGN:We performed quantitative polymerase chain reaction and FACS analyses to study MDR1 (encodes P-glycoprotein) and MRP-1 expression in extravillous (HTR-8/SVne...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2007.02.019
更新日期：2007-05-01 00:00:00
abstract：:This study examined the effects of human chorionic gonadotropin, adrenocorticotropin, human luteinizing hormone, and mouse epidermal growth factor on growth (thymidine incorporation) and steroidogenesis (dehydroepiandrosterone sulfate production) of human fetal zone adrenal cells in monolayer culture. Two preparations...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(87)90077-9
更新日期：1987-03-01 00:00:00
abstract：OBJECTIVE:This study was undertaken to assess the value of minor ultrasonographic markers in predicting significant karyotypic abnormalities. STUDY DESIGN:A total of 2743 fetuses (14-24 weeks' gestation) prospectively underwent a detailed ultrasonographic survey before genetic amniocentesis. Criteria for 8 minor ultra...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(99)70322-4
更新日期：1999-10-01 00:00:00
abstract：BACKGROUND:HIV-seropositive women face high risk for infection with oncogenic human papillomavirus (oncHPV) types, abnormal Pap test results, and precancer, but cervical cancer risk is only modestly increased. Human papillomavirus (HPV)16 is highly oncogenic but only weakly associated with HIV status and immunosuppress...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,多中心研究
doi：10.1016/j.ajog.2015.09.086
更新日期：2016-03-01 00:00:00
abstract：OBJECTIVE:The objective of this study was to quantitatively determine an immunoglobulin G receptor, placental alkaline phosphatase, and its ligand immunoglobulin G in maternal and fetal blood and to study the transport capacity of the receptor. STUDY DESIGN:Venous blood samples from 66 term pregnant women and cord sam...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(94)90479-0
更新日期：1994-07-01 00:00:00
abstract：OBJECTIVES:The study was undertaken to compare Hispanic birth outcomes with those of white and African American women in North Carolina and to examine variables associated with adverse birth outcomes among Hispanic women. STUDY DESIGN:Retrospective comparison of birth outcomes by ethnicity/race, from linked birth/infa...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1067/mob.2003.348
更新日期：2003-05-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to compare cardiac dynamics of high-risk and low-risk fetuses using beat to beat variability. STUDY DESIGN:This study obtained 214 fetal magnetocardiography recordings from a group of high-risk fetuses with maternal conditions associated with placental insufficiency with the ris...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2007.02.017
更新日期：2007-06-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to compare the efficacy and safety profile of prostaglandin E2 with isosorbide mononitrate for cervical ripening before the induction of labor at term. STUDY DESIGN:Primigravid women were assigned randomly to receive either 40 mg of isosorbide mononitrate or 2 mg of prostaglandi...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.ajog.2005.10.812
更新日期：2006-04-01 00:00:00
abstract：OBJECTIVES:This study was carried out to determine the distribution of maternal-fetal medicine (MFM) subspecialists and to profile MFM subspecialists' (1) target patient populations, (2) practice organization, (3) workloads, (4) services provided, and (5) job satisfaction. STUDY DESIGN:The membership of the Society fo...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1067/mob.2001.119719
更新日期：2001-11-01 00:00:00
abstract：:Photosensitization of the endometrium was attempted in vitro and in vivo by intrauterine administration of 5-aminolevulinic acid, which is converted to the photosensitizer protoporphyrin IX. Protoporphyrin IX was found in both functional and basal layers of the endometrial glands at concentrations nine and 10 times hi...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(95)90435-2
更新日期：1995-12-01 00:00:00
abstract：OBJECTIVE:The purposes of this study were to examine endothelial nitric oxide synthase expression in endothelial cells and to determine whether the inhibition of endothelial nitric oxide synthase could impair endothelial barrier function in preeclampsia. STUDY DESIGN:Messenger RNA and protein expression for endothelia...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2003.09.049
更新日期：2004-03-01 00:00:00
abstract：:Theories of intimal injury leading to plaque formation include platelet adhesion and production of growth factors, hypercholesterolemia, smooth muscle cell proliferation, macrophage activity, defective utilization of low-density lipoproteins via deficient receptors, and deficiency in cellular lysosomal enzymes. High l...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/0002-9378(88)90194-9
更新日期：1988-06-01 00:00:00
abstract：:During a 40 year period 374 patients with infiltrative carcinoma of the vulva were evaluated. Some form of radical surgery was the treatment chosen for 278 patients. The absolute 5 year survival rates for all clinical stages treated with some form of radical surgery was 66.8 per cent with a corrected rate of 73.9 per ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(16)33392-0
更新日期：1976-04-15 00:00:00
abstract：:Platelet activation was assessed in hospitalized third-trimester patients with preeclampsia (n = 11) or chronic hypertension with superimposed preeclampsia (n = 11) and in healthy outpatient pregnant controls (n = 10) by measuring plasma beta-thromboglobulin, platelet factor 4, the platelet aggregate ratio, and the am...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(85)90276-5
更新日期：1985-02-15 00:00:00
abstract：OBJECTIVE:This study was undertaken to review pregnancy course and outcome in 56 pregnancies after the placement of a cervicoisthmic cerclage transvaginally. STUDY DESIGN:Fifty-three pregnant patients with unique indications such as previous failure of conventional cerclages or compromised cervical anatomy, underwent ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2005.02.127
更新日期：2005-06-01 00:00:00
abstract：BACKGROUND:In routine antenatal care, blood pressure is used as a screening tool for preeclampsia and its associated adverse outcomes. As such women with a blood pressure greater than 140/90 mm Hg undergo further investigation and closer follow-up, whereas those with lower blood pressures receive no additional care. In...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2019.12.272
更新日期：2020-06-01 00:00:00
abstract：OBJECTIVE:The study aims to investigate the prevalence of maternity blues and examine the risk factors involved in a group of Nigerian postpartum women. STUDY DESIGN:Five hundred and two postpartum women who had a normal vaginal delivery in 5 health centers in Ilesa Township were assessed with the Maternity Blues Scal...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,多中心研究
doi：10.1016/j.ajog.2005.02.085
更新日期：2005-10-01 00:00:00
abstract：:The intervillous blood flow and other maternal hemodynamic parameters were assessed in 40 mothers with pregnancy-induced hypertension in late pregnancy before and after hypotensive treatment. Furosemide caused a significant decrease in the intervillous blood flow, whereas the effects of dihydralazine and metoprolol we...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(86)90093-1
更新日期：1986-07-01 00:00:00
abstract：BACKGROUND:Age-related decline in reproductive potential is mainly due to the increased incidence of aneuploidy. Furthermore, 2 recent studies have shown that euploid embryos of older women may have a lower implantation potential compared to those of younger women, suggesting that aging might compromise embryos beyond ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2018.11.1103
更新日期：2019-04-01 00:00:00
abstract：:Because of various prenatal diagnoses, 606 fetal blood samplings were carried out in 562 pregnancies from the gestational week 17 to 38 with use of a 20-gauge needle guided by ultrasound. The procedure was performed on outpatients under local anesthesia and without medication before or after the procedure. Pure fetal ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(85)80254-4
更新日期：1985-11-15 00:00:00
abstract：OBJECTIVE:The basic mechanisms responsible for human parturition remain to be elucidated. The influx of fetal leukocytes into the myometrium has been recently proposed to be a crucial event in the onset of murine parturition. Surfactant protein-A has been implicated in the initiation of labor. In mice, it is thought th...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2006.06.052
更新日期：2006-09-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to quantify the risk for anal incontinence and difficult defecation among women with prolapse by comparing them with women without prolapse of similar age, body mass index, race, and hysterectomy status, and to determine whether there are characteristics or findings in women with...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2007.03.074
更新日期：2007-11-01 00:00:00
abstract：:If the parents do not want to take the 50% chance that a male fetus will be involved with an x-linked disease, it is desirable to predict fetal sex early enough to safely terminate pregnancy. Slides obtained from midcervical smears of 20 consecutive patients at different stages of gestation were stained with .5% aque...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(73)90541-3
更新日期：1973-03-15 00:00:00
abstract：:Coronavirus disease 2019 is an emerging disease with a rapid increase in cases and deaths since its first identification in Wuhan, China, in December 2019. Limited data are available about coronavirus disease 2019 during pregnancy; however, information on illnesses associated with other highly pathogenic coronaviruses...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/j.ajog.2020.02.017
更新日期：2020-05-01 00:00:00
abstract：:Two fetuses with obstructive uropathy characterized by striking oligohydramnios and dilatation of the urinary collecting system were identified by ultrasound and treated by percutaneous insertion of a long-term vesicoamniotic silicone rubber shunt. Both fetuses were less than 16 weeks' gestation at diagnosis and less ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(83)90685-3
更新日期：1983-04-01 00:00:00
abstract：OBJECTIVE:The physiologic roles of nonphasic firing oxytocin neurons in the paraventricular nucleus of female rats throughout pregnancy and parturition was studied from the viewpoint of changes in the membrane activities. STUDY DESIGN:Thin colonal hypothalamic slices containing the paraventricular nucleus were prepare...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(12)90854-6
更新日期：1993-03-01 00:00:00
abstract：OBJECTIVE:Our purpose was to evaluate the effect of breast-feeding frequency on serum bilirubin levels in the first 3 days after birth. STUDY DESIGN:Two hundred seventy-five infants were randomly assigned to a frequent or demand breast-feeding schedule. RESULTS:Infants in the frequent group (n = 131) nursed nine (7.5...
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/s0002-9378(94)70302-7
更新日期：1994-03-01 00:00:00
