Historical sex ratio in fetal mortality in the United States and its impact on the sex ratio at birth*
Page 1 SIDeS, «Popolazione e Storia», 2/2022, pp. 9-35. DOI: 10.4424/ps2022-5 Historical sex …

Objectives—This report presents total sex ratios at birth from to detect changes in the sex
ratio over time. 1940 to 2002, for race starting in 1970, for Hispanic origin groups Results …

Objective: To determine if the sex ratio of live births in the United States has changed during
the 27 years from 1969 through 1995. Design: Regression analysis of secular trends in sex …

Context: A previous study showed that significantly more boys were born in southern
latitudes in Europe than in northern latitudes and the converse pattern was observed in …

Objective The normal male to female livebirth sex ratio ranges from 1.03 to 1.07. Higher
ratios in China, India and Korea reflect prenatal sex selection. We reviewed sex ratios for US …

We describe the trajectory of the human sex ratio from conception to birth by analyzing data
from (i) 3-to 6-d-old embryos,(ii) induced abortions,(iii) chorionic villus sampling,(iv) …

The sex ratio at birth (SR) is defined as the number of males per 100 females and is almost
always around 106. John Graunt (1620–1674) was the first to compile data showing an …

Many factors that affect teratogenesis and fetal death may vary from one region to another as
well as in different time periods. Our aim was to identify trends in the sex ratio of intrauterine …

This paper uses data from the Human Mortality Database to examine sex differences in e0
and age patterns in sex ratios of nMx over time for 24 countries. From 1751 to 1900, the …

This study explores the short-term relationships between sex ratio at birth and late fetal
mortality in Italy from 1910 to 2016. As the leading scholars' attention traditionally focused on …