sex ratio

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Related to Birth ratio: Total fertility rate

sex ratio

[′seks ‚rā·shō]
(biology)
The relative proportion of males and females in a population.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Currently, the number may be 914, but it still shows [the] female birth ratio is just about 46 per cent," she said.
In China, it is even worse: According to the China Ministry of Civil Affairs, in 2009, the birth ratio due to sex-selection abortion was 120 boys to 100 girls.
However NHS West Midlands questioned the figures as it had increased its midwife to birth ratio. Guay Ong, regional manager for the Royal College of Midwives in the West Midlands, said investment and action needed to be taken now.
Posters in India say, "Indira Gandhi and Mother Teresa: Your daughter can be one of them." But even if every nation's male-female birth ratio returned to normal tomorrow, the excess male births thus far would skew the global population for decades to come.
Demographic and behavioral determinants of male-to-female birth ratio in Spain from 1981 to 1997.
The boy:girl birth ratio has shown a marked decline in some regions and disorders of the reproductive system are being reported more frequently among boys at birth.
It is after they have "adjusted" these initial study figures to suit their assumptions that WHO statisticians create their estimates of the "unsafe abortion to live birth ratio" and the percent of "maternal deaths due to abortion." What comes next?
The male birth ratio was also reduced - to 0.98 - among couples where the mother did not smoke, but the father smoked heavily.
The contribution of ART to the overall triplet and higher-order multiple birth ratio was estimated to be 38.7% in 1996 and 43.3% in 1997, a substantial increase from the estimated 22% for 1990 and 1991 (Table 2).
One contributing factor to the number of African-American children in such households is the high out-of-wedlock birth ratio (approximately 60 percent) among black women.(1) What are the factors that influence out-of-wedlock births among African Americans?
For his study, Francis chose three measures of sexual behaviour: The illegitimate birth ratio; the teen birth share; and the incidence of gonorrhea, a highly contagious sexually transmitted disease that tends to spread quickly.