منابع مشابه
Association between the rates of multiple maternities.
We analyze the association between the rates of multiple maternities. Correlation analysis is suitable if there are at least monotonic relationships between the variables. A decreasing tendency can be observed in the rates of multiple maternities in Sweden and in its 25 counties for the period 1751-1960 and the effect of external variables can be assumed to be monotonic. After 1960, the rates o...
متن کاملTemporal trends in the rates of multiple maternities in England and Wales.
After a long continuous decrease, the twinning and higher multifetal rates in many developed countries have increased during the last 2 to 3 decades. This change has been attributed to delayed childbearing and to increased use of subfertility treatments, particularly in women over 35 years of age. In this study we analyze how these new trends depend on changes in the effect of maternal age on t...
متن کاملSuccessful implementation of evidence-based routines in Ukrainian maternities.
OBJECTIVE To describe the process of change and assess compliance and effect on maternal and infant outcome when the WHO package Effective Perinatal Care (EPC) was implemented at maternities in Ukraine. DESIGN Intervention study comparing outcomes before and during 2.5 years after training. SETTING Three maternities in Donetsk, Lutsk and Lviv 2003-2006. POPULATION Baseline data were colle...
متن کاملReduced solar activity favors twin maternities.
Mechanisms underlying effects of physical factors on twin births are unclear. The present work studied an association between monthly and yearly multiple birth rates (MBRs) in the Novosibirsk region, south-west Siberia, in relation to solar activity (sunspot numbers) and geomagnetic activity (Ap index) from 1957 to 2008. The difference was verified by comparing the yearly MBR observed in 3-year...
متن کاملMelatonin Contributes to the Seasonality of Multiple Sclerosis Relapses
Seasonal changes in disease activity have been observed in multiple sclerosis, an autoimmune disorder that affects the CNS. These epidemiological observations suggest that environmental factors influence the disease course. Here, we report that melatonin levels, whose production is modulated by seasonal variations in night length, negatively correlate with multiple sclerosis activity in humans....
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ژورنال
عنوان ژورنال: Twin Research and Human Genetics
سال: 2017
ISSN: 1832-4274,1839-2628
DOI: 10.1017/thg.2017.56