in a case control study the effects of literacy, socio-economic status and the fertility behavior of mothers were fully investigated in two groups. out of 13123 babies born in 17 hospitals during almost 8 months in 1988-1989 in tehran 730 had a low birth weight (less than 2500 gr). as a control group, 1460 births were randomly selected from normal weight births. some basic findings are as follo...

the objective of this study is to determine risk factors causing increase in very low birth way (vlbw) neonatal mortality. the medical files of all neonates weighing ≤1500 g, born in vali-e-asr hospital (2001-2004) were studied. two groups of neonates (living and dead) were compared up to the time of hospital discharge or death. a total of 317 neonates were enrolled. a meaningful relationship e...

Seasonal differences in suicide birth rates among Alaska Natives and for populations at different latitudes (residents of the Yukon, Saskatchewan, Montana, Wyoming, and Pennsylvania) were investigated. Seasonal birth rates for the general population were similarly examined. Suicide birth rates showed small seasonal variations for Alaska Natives with summer births showing more suicides. However,...

OBJECTIVES This report provides State-specific birth rates for teenagers for 1991 and 1996 and the percent change, 1991-96. METHODS Tabular and graphical description of trends in teenage birth rates by age group for each State. RESULTS Birth rates for teenagers 15-19 years declined significantly in all but three States between 1991 and 1996. Declines by State ranged from 6 to 29 percent.

Despite implications for both humans and the environment, a scant body of research examines fertility in forest frontiers. This study examines the fertility– environment association using empirical data from Ecuadorian Amazon between 1980 and 1999. Fertility dramatically declined during this period, and our empirical models suggest that households’ relationship to land partially explains this d...

KEY FINDINGS •The teen birth rate declined to another historic low for the United States in 2015, down 8% from 2014 to 22.3 births per 1,000 females aged 15-19. •The birth rates for teenagers aged 15-17 and 18-19 declined in 2015 to 9.9 and 40.7, respectively, which are record lows for both groups. •In 2015, birth rates declined to 6.9 for Asian or Pacific Islander, 16.0 for non-Hispanic white,...

OBJECTIVES This report provides State-specific birth rates for teenagers for 1991 and 2000, and the percent change between the time periods. METHODS Tabular and graphical description of trends in teenage birth rates by age group for each State and territory. RESULTS Birth rates for teenagers 15-19 years declined significantly in all States, the Virgin Islands and Guam, between 1991 and 2000...