Abstract:
OBJECTIVE:To challenge the hypothesis that discordant growth is a normal variation by relating birth weight discordance to total twin birth weight. METHODS Among 12,565 Israeli live-born twin pairs (1993-98), we compared total twin birth weight decile, the frequencies of three levels of discordance in the general population, over 25% discordance between like- versus unlike-sex pairs, and over 25% discordance between pairs delivered by primiparas versus multiparas. RESULTS:We found a marked change in the best-fit correlation function with increased discordance: level 15-24.9% was inversely linear whereas levels 25-34.9% and over 34.9% were inversely logarithmic (R(2) =.47,.88, and.9, respectively). The best-fit correlation of frequencies of more than 25% discordance was inversely logarithmic and similar in like- and unlike-sexed twins across deciles functions (P =.7, odds ratio [OR] 1.0, 95% confidence interval [CI] 0.9, 1.2). The overall frequencies of discordance were also similar (9.3% versus 10.2%, P =.11, OR 0.9, 95% CI 0.8, 1.0). The frequencies of primiparas decreased linearly (R(2) =.98) and the frequencies of more than 25% discordant pairs in multiparas and primiparas across the deciles had similar inversely logarithmic patterns (P =.55, OR 1.0, 95% CI 0.9, 1.2). Discordance over 25% was significantly more frequent among primiparas (P <.001, OR 1.45, 95% CI 1.3, 1.6). CONCLUSION:The observed patterns of birth weight discordance did not substantiate normal variation but an adaptive growth restriction that might explain why the likelihood of discordant growth decreases as total twin birth weight increases.
journal_name
Obstet Gynecoljournal_title
Obstetrics and gynecologyauthors
Blickstein I,Goldman RD,Mazkereth Rdoi
10.1016/s0029-7844(00)01079-6subject
Has Abstractpub_date
2000-12-01 00:00:00pages
986-90issue
6eissn
0029-7844issn
1873-233Xpii
S0029784400010796journal_volume
96pub_type
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journal_title:Obstetrics and gynecology
pub_type: 杂志文章
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abstract:OBJECTIVE:To estimate the influence of adequacy of prenatal care and other known risk factors on the risk of repeating low birth weight (LBW) (less than 2500 g). METHODS:This was a retrospective cohort study of women having two births in Washington state during 1984-1990, as recorded using linked birth certificate rec...
journal_title:Obstetrics and gynecology
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abstract::The effectiveness of clonidine in suppressing the occurrence of postmenopausal hot flashes was examined using a dose-response study design and objective recordings of hot flashes. Patients with frequent flashes were studied before and after oral administration of placebo and 0.1, 0.2, and 0.4 mg of clonidine daily for...
journal_title:Obstetrics and gynecology
pub_type: 临床试验,杂志文章
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abstract::Ultrasonography plays an integral part in the prenatal diagnosis of neural tube defects. However, experienced sonographers with careful evaluation are successful in accurately diagnosing spina bifida only 80-90% of the time. This study was conducted to evaluate the accuracy and reliability of certain cranial ultrasoun...
journal_title:Obstetrics and gynecology
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更新日期:1990-07-01 00:00:00
abstract:OBJECTIVE:To estimate both human immunodeficiency virus (HIV) testing acceptance rates in pregnancy using an opt-out policy and patient characteristics influencing acceptance. METHODS:At the first prenatal visit, HIV testing was offered using an opt-out approach. Reasons for refusing testing were explored. Demographic...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1097/01.AOG.0000267497.39041.06
更新日期:2007-07-01 00:00:00
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journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:
更新日期:1978-11-01 00:00:00
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journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1097/AOG.0b013e31818bdc7e
更新日期:2008-12-01 00:00:00
abstract:OBJECTIVE:To examine the association between the mode of delivery and the risk of offspring obesity by age 21 years using a large community-based birth cohort study in Australia. METHODS:We followed-up a subsample of 2,625 offspring for whom we had measured physical assessments, including height and weight at 21 years...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1097/AOG.0000000000000016
更新日期:2013-12-01 00:00:00
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journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1097/AOG.0000000000001758
更新日期:2017-01-01 00:00:00
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pub_type: 杂志文章
doi:
更新日期:1987-11-01 00:00:00
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journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:
更新日期:1990-09-01 00:00:00
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doi:10.1097/AOG.0b013e31817051d9
更新日期:2008-05-01 00:00:00
abstract:BACKGROUND:Cortical blindness is a complication of severe preeclampsia, but it is unclear whether it results from cerebral vasospasm and ischemic injury or vasogenic (hydrostatic) edema due to increased capillary permeability. CASE:Reversible cortical blindness in a 33-year-old gravida 2, para 1, with severe postpartu...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0029-7844(00)00878-4
更新日期:2000-06-01 00:00:00
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journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1097/01.AOG.0000160484.20261.fd
更新日期:2005-11-01 00:00:00
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doi:10.1097/AOG.0000000000002956
更新日期:2018-12-01 00:00:00
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更新日期:2004-09-01 00:00:00
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journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1097/AOG.0000000000003276
更新日期:2019-06-01 00:00:00
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journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:
更新日期:1990-03-01 00:00:00
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journal_title:Obstetrics and gynecology
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doi:
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journal_title:Obstetrics and gynecology
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doi:
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更新日期:2004-03-01 00:00:00
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pub_type: 杂志文章
doi:10.1016/s0029-7844(00)00862-0
更新日期:2000-08-01 00:00:00
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doi:10.1097/AOG.0000000000003932
更新日期:2020-09-01 00:00:00
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journal_title:Obstetrics and gynecology
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:1995-10-01 00:00:00
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pub_type: 杂志文章
doi:
更新日期:1984-01-01 00:00:00
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pub_type: 杂志文章
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更新日期:2011-09-01 00:00:00
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pub_type: 杂志文章
doi:10.1016/s0029-7844(97)00655-8
更新日期:1998-05-01 00:00:00
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更新日期:2014-05-01 00:00:00