the number of births per head of population over a given period.tasa de natalidad give birth (to) (of a mother) to produce (a baby) from the womb.She has given birth to two sets of twins.dar a luz, parir; dar lugar a, ser el origen de ...
For example, if 35 births occur per year per 1000 individuals, the birth rate is 35. Often this rate is expressed as a percentage, in this case 3.5 per 100, or 3.5%. Populations can be subdivided into juveniles (before puberty), reproductive adults, and postreproductive adults (those too...
trends, with differences between trends compared by linear regression.The conditional sex ratio for second-order births when the firstborn was a girl fell from 906 per 1000 boys (99% CI 798-1013) in 1990 to 836 (733-939) in 2005; an annual decline of 0·52% (p for trend=0·002)....
Methods We examined birth histories from five nationally representative household surveys (National Family Health Surveys 1–4 and District Level Household Survey 2) to compute the conditional sex ratio (defined as the number of girls born per 1000 boys depending on previous birth sex) in India ...
America's birth rate fell to a record low last year.───美国去年的出生率降到了创纪录的最低点。 The birth rate have fall to twelve per hundred.───出生率下降到12%. One of her major tasks will be to encourage family - friendly policies to boost Japan's birth rate.───福岛的主要...
In recent decades China has experienced an extremely rapid fertility reduction from more than six children per woman in the early 1960s to just over 1.6 children per woman in 2005 (Fig. 3.1). This fertility transition has resulted since the 1980s in significantly more boys being born each ye...
Each PDMS-2 assessment session lasted approximately 30 min per child. Dual independent testers concurrently observed each child’s performance, adhering strictly to PDMS-2 guidelines [30]. All requisite equipment was readied ahead of the assessment day. On the day of evaluation, participants received...
The World Health Organization (WHO) estimates that there are approximately 15 million preterm (<37 weeks’ gestation) deliveries per year globally [10,11]. This results in a PTB rate of 11%, and for many countries, it continues to be on the rise [11]. Global PTB rates increased from ...
Over the past decade, the birth rate in Italy has constantly decreased – in 2023 6.4 children were estimated to be born per 1,000 inhabitants, three infants less than in 2002. The region with the highest birth rate in the country was Trentino-South Tyrol, where 7.9 children were born per...
All 40-89 year-old inhabitants in the city of Malm,... B Yan,E Gunnar,E Birgitta,... 被引量: 0发表: 2018年 Experimental manipulation of queen number affects colony sex ratio investment in the highly polygynous ant Formica exsecta In polygynous (multiple queens per nest) ants, queen ...