the data were collected from 1992 to 2009 in burri, white boni and black boni sheep maintained at the regional research station in the central highlands of yemen. data were analyzed to study the effects of environmental and genetic factors on body weight and growth rate from birth to weaning. the least square means for body weights (bw) were 2.54, 2.18 and 2.26 kg for birth; 12.49, 10.58 and 11...

Births According to provisional reports, an estimated 320,000 births occurred in the United States during January 1996. This was a 9-percent decrease from the provisional number of births reported for January 1995 (350,000). The birth rate, 14.3 live births per 1,000 population, was 9 percent lower than the rate of 15.8 for January 1995. The fertility rate, 63.5 live births per 1,000 women 15–4...

Births According to provisional reports, an estimated 339,000 births occurred in the United States during August 1997. This was a 6-percent decrease from the provisional number of births reported for August 1996 (360,000). The birth rate, 14.9 live births per 1,000 population, was 7 percent lower than August 1996 (16.0). The fertility rate, 66.9 live births per 1,000 women 15–44 years, was 6 pe...

KEY FINDINGS Data from the National Vital Statistics System •There were 3.978 million births in the United States in 2015, down less than 1% from 2014. •The 2015 U.S. general fertility rate (births per 1,000 women aged 15-44) was down 1% from 2014. •Birth rates dropped in 2015 to record lows among women under age 30 and rose for those aged 30-44. •The cesarean delivery rate declined to 32.0% of...

CONTEXT Substantial concern surrounds the potential health effects of the anthrax vaccine, particularly the potential adverse effects on reproductive processes. OBJECTIVE To determine whether receipt of anthrax vaccination by reproductive-aged women has an effect on pregnancy rates. DESIGN, SETTING, AND PATIENTS Cohort study, based on information from a computer database, of women aged 17 t...

Births According to provisional reports, an estimated 307,000 births occurred in the United States during March 1997. This was a decrease of 8 percent from the provisional number of births reported for March 1996 (334,000). The birth rate, 13.6 live births per 1,000 population, was 9 percent lower than the rate of 14.9 for March 1996. The fertility rate, 60.7 live births per 1,000 women ages 15...

The fertility rate, 61.4 live births per 1,000 women 15–44 years, was 4 percent lower than the comparable rate for November 1996 (63.9). The seasonally adjusted fertility rate (63.4) was also 4 percent lower than the comparable rate for November 1996 (66.0).000 live births occurred in the 12-month period ending with November 1997, a 2-percent decrease from the 3,897,000 births reported for the ...

Births According to provisional reports, an estimated 340,000 births occurred in the United States during April 1997. This was an 8-percent increase from the provisional number of births reported for April 1996 (314,000). The birth rate, 15.5 live births per 1,000 population, was 7 percent higher than the rate of 14.5 for April 1996. The fertility rate, 69.4 live births per 1,000 women 15–44 ye...

The fertility rate, 61.0 live births per 1,000 women 15–44 years, was 7 percent lower than the comparable rate for May 1996 (65.7). The seasonally adjusted fertility rate (61.4) was also 7 percent lower than the comparable rate for May 1996 (66.2). During the first 5 months of 1997, an estimated 1,550,000 births occurred, 2 percent lower than the 1,585,000 reported for the first 5 months of 199...

Births According to provisional reports, an estimated 323,000 births occurred in the United States during June 1997. This was a 6-percent increase from the provisional number of births reported for June 1996 (304,000). The birth rate, 14.7 live births per 1,000 population, was 5 percent higher than the rate of 14.0 for June 1996. The fertility rate, 65.7 live births per 1,000 women aged 15–44 y...