Add to ORKGA sample based on hospital births recorded for the Latin American Collaborative Study on Congenital Malformations (ECLAMC) program was used in the present study to determine sex ratios for live births and for stillbirths. Sixty-four cities and 147 hospitals in 11 countries (Uruguay, Chile, Argentina, Brazil, Bolivia, Peru, Paraguay, Ecuador, Venezuela, Colombia, and Costa Rica) were included in the present analyses. The number of live births was 1,886,653 in the period 1967-1986, and the number of stillbirths was 24,818 in the period 1978-1986. The sex ratio for the total sample was 0.5112 for live births and 0.5477 for stillbirths. The sex ratio as a whole is decreasing with time in a parabolic fashion. Each country in our study behaved di...
a<p>Estimates for the 1970s exclude the following countries that are included for subsequent decades...
This study analyzes the distribution of sex ratio at birth in African populations using data collect...
The thesis is mainly focused on the analysis and evaluation of the effects influencing the sex ratio...
A sample based on hospital births recorded for the Latin American Collaborative Study on Congenital ...
A sample based on hospital birth records from the Latin American Collaborative Study on Congenital M...
AbstractObjectivesLatitude gradients have been found in the male-female ratio at birth (M/F: male di...
We have analysed trends in male:female ratios among newborns between 1950 and 1990 in 29 countries f...
6To whom all correspondence should be addressed We have analysed trends in male:female ratios among ...
Objectives: Latitude gradients have been found in the male-female ratio at birth (M/F: male divided ...
The annual variation of the sex ratio (SR) of 1385 twin births was analyzed and compared to that of ...
<p>NTD: neural tube defect; FAF: folic acid fortification; M/F: male/female; Sex ratio (male/female)...
Several studies suggest that exposure to environmental endocrine disrupters can reduce the number of...
The rate of population growth in Latin America has increased continuously between 1930 and 1960, and...
SummaryBackgroundUnder natural circumstances, the sex ratio of male to female mortality up to the ag...
There is a recent renewal of interest in the relation between shifts in age structures of population...
a<p>Estimates for the 1970s exclude the following countries that are included for subsequent decades...
This study analyzes the distribution of sex ratio at birth in African populations using data collect...
The thesis is mainly focused on the analysis and evaluation of the effects influencing the sex ratio...
A sample based on hospital births recorded for the Latin American Collaborative Study on Congenital ...
A sample based on hospital birth records from the Latin American Collaborative Study on Congenital M...
AbstractObjectivesLatitude gradients have been found in the male-female ratio at birth (M/F: male di...
We have analysed trends in male:female ratios among newborns between 1950 and 1990 in 29 countries f...
6To whom all correspondence should be addressed We have analysed trends in male:female ratios among ...
Objectives: Latitude gradients have been found in the male-female ratio at birth (M/F: male divided ...
The annual variation of the sex ratio (SR) of 1385 twin births was analyzed and compared to that of ...
<p>NTD: neural tube defect; FAF: folic acid fortification; M/F: male/female; Sex ratio (male/female)...
Several studies suggest that exposure to environmental endocrine disrupters can reduce the number of...
The rate of population growth in Latin America has increased continuously between 1930 and 1960, and...
SummaryBackgroundUnder natural circumstances, the sex ratio of male to female mortality up to the ag...
There is a recent renewal of interest in the relation between shifts in age structures of population...
a<p>Estimates for the 1970s exclude the following countries that are included for subsequent decades...
This study analyzes the distribution of sex ratio at birth in African populations using data collect...
The thesis is mainly focused on the analysis and evaluation of the effects influencing the sex ratio...
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