نتایج جستجو برای: multiple births
تعداد نتایج: 772313 فیلتر نتایج به سال:
Physician prediction model for live birth and multiple births after assisted reproductive technology
BACKGROUND The few studies that have investigated the relationship between emissions from municipal solid-waste incinerators and adverse pregnancy outcomes have had conflicting results. We conducted a study to assess the effects of air emissions from the eight incinerators currently in operation in the Emilia-Romagna Region of Italy on reproductive outcomes (sex ratio, multiple births, preterm ...
CONTEXT Although early nonmarital fertility has been well studied, less attention has been paid to the subsequent fertility of young unwed mothers. In particular, the frequency with which these young women have subsequent births with a new partner (multipartnered fertility) and the risk factors associated with doing so are unknown. METHODS The proportion of young women who had a first birth a...
OBJECTIVES Low Birth Weight (LBW) has an important role in the mortality and morbidity of neonates and the incidence of LBW may vary across different environments. The aim of this study was to determine the incidence and some related factors of LBW in Mazandaran province, Northern Iran. METHODS In this longitudinal study, all live births that were born in 5 maternity hospitals in Mazandaran p...
Free-ranging mantled howling monkey (Alouatta palliata Gray) females experienced a regular estrus cycle averaging 16.3 days, demonstrated sexual skin changes, and participated in multiple matings before becoming pregnant. Gestation averaged 186 days. The average interval between births was 22.5 months. Sexual maturity occurred at approximately 36 and 42 months for females and males, respectivel...
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...
Data on Live Births (LBs) and Fetal Deaths (FDs) were obtained from vital statistic records maintained by the Statistics and Information Department, Ministry of Health, Labour and Welfare (Tokyo, Japan) for the years 1995-2008. These data cover the entire Japanese population. LB certificates contain information on nationality, sex, date of birth, BW, GA, parental dates of birth and age, single ...
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