Abstract：
OBJECTIVE:The purpose of this study was to determine the frequency, distribution, and most likely etiology of hematologic and weight discordance in pathologically proven monochorionic twins, and to use this information to reevaluate the neonatally derived definition of the twin-twin transfusion syndrome. METHODS:We reviewed our experience with 97 pathologically proven monochorionic twin pregnancies. The frequency and distribution of weight and hemoglobin-hematocrit (hb-hct) discordance were determined for all twin pairs. Factors that may have contributed to the discordance were identified, and theoretical mechanisms were proposed. RESULTS:All combinations of weight and hb-hct discordance were observed. Thirty-four twin pairs (35%) were discordant for weight. In half of these (17 of 34), the hb and hct were concordant. In 18% (six of 34), the smaller twin had the higher hb-hct, and in 32% (11 of 34), the smaller twin had the lower hb-hct. Twenty-three of 63 size-concordant pairs (36%) were discordant for hb-hct. Ten infants were infected at birth, eight had malformations, and 25 likely suffered an acute transfusion event. CONCLUSIONS:Any combination of weight and hb-hct discordance can occur in monochorionic twins. Acute and chronic twin-twin transfusion, uteroplacental insufficiency, infection, malformations, or other factors may have accounted for the discordance observed. Thorough antenatal evaluation with invasive testing and marker studies (to identify a physiologically unbalanced placental anastomosis) may be necessary to establish an accurate diagnosis. We conclude that weight and/or hb-hct discordance is relatively common in monochorionic twins and in itself is not sufficient to diagnose twin-twin transfusion.
journal_name
Obstet Gynecoljournal_title
Obstetrics and gynecologyauthors
Wenstrom KD,Tessen JA,Zlatnik FJ,Sipes SLsubject
Has Abstractpub_date
1992-08-01 00:00:00pages
257-61issue
2eissn
0029-7844issn
1873-233Xjournal_volume
80pub_type
杂志文章abstract：:A double-blind, placebo-controlled, dose-ranging study was undertaken to evaluate the efficacy of two doses of intracervical prostaglandin E2 gel in patients with unfavorable Bishop scores. Mean change in Bishop score, success of softening, time to labor, and time to delivery were all significantly different in the tw...
journal_title：Obstetrics and gynecology
pub_type： 临床试验,杂志文章
doi：
更新日期：1986-07-01 00:00:00
abstract：OBJECTIVE:To investigate whether activation of circulating platelets was present in the fetal and maternal circulation in cases with vascular disease in the fetal-umbilical-placental circulation as identified by umbilical artery Doppler study. METHODS:We studied 20 mother-fetus pairs with an abnormal umbilical artery ...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0029-7844(03)00173-x
更新日期：2003-05-01 00:00:00
abstract：:Heavy menstrual bleeding is defined as excessive menstrual blood loss that interferes with a woman's physical, social, emotional, or material quality of life. If obstetrician-gynecologists suspect that a patient has a bleeding disorder, they should work in coordination with a hematologist for laboratory evaluation and...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1097/AOG.0000000000003412
更新日期：2019-09-01 00:00:00
abstract：:The effect of norethisterone on bone mineral metabolism was examined in 43 postmenopausal women. A significant decline in serum calcium, phosphate, and alkaline phosphatase in urinary calcium/creatinine ratio and in tubular maximum reabsorption of phosphate was demonstrated. There was no alteration in urinary hydroxyp...
journal_title：Obstetrics and gynecology
pub_type： 临床试验,杂志文章
doi：
更新日期：1985-12-01 00:00:00
abstract：:Two U.S. Food and Drug Administration public health warnings regarding the use of mesh in stress incontinence and prolapse repairs have had far-reaching clinical and legal consequences. In this commentary, we explore the drastically distinct results from these mesh-based procedures, which revealed systemic flaws with ...
journal_title：Obstetrics and gynecology
pub_type： 社论
doi：10.1097/AOG.0000000000002776
更新日期：2018-09-01 00:00:00
abstract：OBJECTIVE:Bacterial vaginosis is a common infectious disorder. Although known since ancient times, little progress has occurred in identifying causal factors. Our aims were to study the bacterial community structure and the spatial organization of microbiota on the epithelial surfaces of vaginal biopsy specimens. METH...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1097/01.AOG.0000183594.45524.d2
更新日期：2005-11-01 00:00:00
abstract：OBJECTIVE:To determine whether using a treatment strategy minimizing lymph node sampling and radiation therapy compromised outcome in patients with early endometrial carcinoma. METHODS:One hundred three consecutive patients with International Federation of Gynecology and Obstetrics surgical stage I, II, or III endomet...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1993-08-01 00:00:00
abstract：OBJECTIVE:To develop a curriculum for residents in obstetrics and gynecology that also provides training in family medicine. METHODS:We designed a 5-year curriculum with 36 months of obstetrics and gynecology, 12 of which are as chief resident, with a 4-month rotation through family medicine to meet the primary care r...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1999-08-01 00:00:00
abstract：:Immediate postpartum long-acting reversible contraception (LARC) has the potential to reduce unintended and short-interval pregnancy. Women should be counseled about all forms of postpartum contraception in a context that allows informed decision making. Immediate postpartum LARC should be offered as an effective opti...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1097/AOG.0000000000001583
更新日期：2016-08-01 00:00:00
abstract：:To prevent transmission of bloodborne pathogens, it is important that health care providers adhere to standard precautions, follow fundamental infection-control principles, and use appropriate procedural techniques. All obstetrician-gynecologists who provide clinical care should receive the hepatitis B virus vaccine s...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1097/AOG.0000000000001315
更新日期：2016-02-01 00:00:00
abstract：BACKGROUND:There has been one reported case of porencephaly diagnosed postnatally as a result of amniocentesis. We report the first antenatal diagnosis of porencephaly, which apparently resulted from penetration of the fetal skull during amniocentesis. CASE:A 37-year-old woman had genetic amniocentesis at 16 weeks' ge...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0029-7844(94)00315-5
更新日期：1995-05-01 00:00:00
abstract：OBJECTIVE:To assess the estrogenic effect of tamoxifen and associated pathologic changes of the endometrium in postmenopausal breast cancer patients. METHODS:The endometrium of 103 gynecologically asymptomatic postmenopausal breast cancer patients was examined. Fifty-one had been treated with tamoxifen and 52 had not ...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1993-05-01 00:00:00
abstract：OBJECTIVE:To compare lecture and small-group discussion for third-year medical students in obstetrics and gynecology. METHODS:Over a 2-year period, 91 third-year medical students in the obstetrics and gynecology clerkships were given educational sessions on diabetes and hypertension in pregnancy by a single instructor...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1097/01.AOG.0000133485.02727.ba
更新日期：2004-08-01 00:00:00
abstract：:To determine whether Lamaze childbirth preparation is harmless, harmful, or beneficial, 500 consecutive Lamaze-prepared patients were compared to 500 hand-picked controls, matched for age, race, parity, and educational level. Lamaze preparation was found to have a significant beneficial effect in almost every obstetri...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1978-06-01 00:00:00
abstract：OBJECTIVE:To determine whether outpatient administration of intracervical prostaglandin (PG) E2 gel decreases the interval to delivery and duration of labor. METHODS:A randomized, double-blind, placebo-controlled trial compared the intracervical placement of 0.5 mg PGE2 gel with placebo in 61 pregnant women at 38 week...
journal_title：Obstetrics and gynecology
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1016/s0029-7844(99)00244-6
更新日期：1999-07-01 00:00:00
abstract：OBJECTIVE:To analyze the influence of body mass on the outcome of surgery for urinary incontinence. METHODS:Among 291 women operated on for stress incontinence, 187 (64%) were available for follow-up at 5 years. Eighty women had anterior colporrhaphy, 49 anterior colporrhaphy with needle suspension of the bladder neck...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0029-7844(98)00513-4
更新日期：1999-05-01 00:00:00
abstract：OBJECTIVE:To assess the efficacy of a novel resorbable hydrogel barrier for preventing postoperative adhesions in animals. METHODS:A hydrogel barrier was formed in situ by photopolymerizing a solution of a macromolecular prepolymer in buffered saline using long-wavelength ultraviolet light. Two models in the rat were ...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1994-01-01 00:00:00
abstract：:A 64-year-old woman with a 45,X karyotype and Turner's syndrome and recent onset of right lower quadrant pain was found to have a mucinous cystadenoma with focal areas of borderline malignancy and a typical Brenner tumor in the right adnexa. Ovarian tumors in patients with a 45,X karyotype and Turner's syndrome are ex...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1979-11-01 00:00:00
abstract：BACKGROUND:Up to 20% of ovarian epithelial tumors are classified as being of low malignant potential. Most of these low malignant potential tumors are detected at an early stage and have an excellent prognosis. This is a report of a woman with cardiac metastasis from an ovarian low malignant potential tumor. CASE:This...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0029-7844(97)81429-9
更新日期：1997-05-01 00:00:00
abstract：OBJECTIVE:To evaluate the appropriateness of recommendations for hysterectomies done for nonemergency and non-oncologic indications. METHODS:We assessed the appropriateness of recommendations for hysterectomy for 497 women who had the operation between August 1993 and July 1995 in one of nine capitated medical groups ...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0029-7844(99)00519-0
更新日期：2000-02-01 00:00:00
abstract：:The ACOG has recommended that the initial visit to an obstetrician-gynecologist for health guidance, screening, and provision of preventive services should take place around age 13-15. At this visit, clinicians can provide guidance to young girls and their parents on adolescent physical development based on data that ...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/s0029-7844(02)01660-5
更新日期：2002-04-01 00:00:00
abstract：:Intrauterine exposure to diethylstilbestrol (DES) has been associated with ths subsequent rare development of clear cell adenocarcinoma of the vagina and cervix in exposed female progeny. These tumors have been seen thus far in patients between the ages of 7 and 29 years. In addition, nonmalignant epithelial and struc...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章,评审
doi：
更新日期：1981-11-01 00:00:00
abstract：:This study was designed to compare the effects of two low-dose triphasic oral contraceptives (OCs) on glucose tolerance and insulin secretion. Fifty-seven women were randomized to receive OCs containing ethinyl estradiol and either levonorgestrel or norethindrone. Ten subjects using nonhormonal contraception served as...
journal_title：Obstetrics and gynecology
pub_type： 临床试验,杂志文章,随机对照试验
doi：
更新日期：1991-07-01 00:00:00
abstract：BACKGROUND:Cannabinoid hyperemesis syndrome is a condition present among chronic cannabis users resulting in abdominal pain, intractable nausea and vomiting, and compulsive bathing behaviors. Given the recent legalization of marijuana in certain areas of the United States, the incidence of this condition may increase a...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1097/AOG.0000000000000595
更新日期：2015-06-01 00:00:00
abstract：:Exercise, defined as physical activity consisting of planned, structured, and repetitive bodily movements done to improve one or more components of physical fitness, is an essential element of a healthy lifestyle, and obstetrician-gynecologists and other obstetric care providers should encourage their patients to cont...
journal_title：Obstetrics and gynecology
pub_type： 共识发展会议,杂志文章
doi：10.1097/AOG.0000000000003772
更新日期：2020-04-01 00:00:00
abstract：OBJECTIVE:To identify characteristics associated with high inpatient daily opioid consumption after cesarean delivery. METHODS:This is a retrospective cohort study of all cesarean deliveries performed under neuraxial anesthesia with neuraxial morphine, at a single institution from January 1, 2015, to December 31, 2015...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：10.1097/AOG.0000000000003087
更新日期：2019-02-01 00:00:00
abstract：OBJECTIVE:To describe ethnic differences in tobacco use during pregnancy in a clinical population of Mexican-American and non-Hispanic white women. METHODS:Subjects were randomly selected from all patients attending a university-based obstetrics clinic in Tucson, Arizona. Of 555 subjects selected, 367 were interviewed...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1994-12-01 00:00:00
abstract：:Women who present with pain and bleeding in the first trimester are at risk for ectopic pregnancy, a life-threatening condition. Conditions that predispose a woman to ectopic pregnancy are damaged fallopian tubes from prior tubal surgery or previous pelvic infection, smoking, and conception using assisted reproduction...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1097/01.AOG.0000198632.15229.be
更新日期：2006-02-01 00:00:00
abstract：:Ultrasound methods for detecting fetal life during early pregnancy are reviewed. By using recently developed techniques, fetal heart function can be detected as early as the 44th to 45th day of amenorrhea. Fetal movements in the amniotic cavity can be visualized from the 10th week on. If no signs of fetal life can be ...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1975-11-01 00:00:00
abstract：OBJECTIVE:To investigate the effect of second uterine curettage on the number of chemotherapy courses and relapse rate in low-risk postmolar gestational trophoblastic neoplasia. METHODS:In a phase III trial, patients with low risk gestational trophoblastic neoplasia were randomised (1:1) to a second curettage or no cu...
journal_title：Obstetrics and gynecology
pub_type： 杂志文章,随机对照试验
doi：10.1097/AOG.0000000000003232
更新日期：2019-05-01 00:00:00
