sex ratio

(redirected from Birth 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.
References in periodicals archive ?
Declining Minamata male birth ratio associated with increased male fetal death due to heavy methylmercury pollution.
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.
The male-to-female birth ratio is higher in the northern latitudes than in the southern latitudes of North America, but the reverse is true of Europe.
The contribution of ART to the overall triplet and higher-order multiple birth ratio was estimated to be 38.
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.
While the overall United Kingdom birth ratio is within normal limits, analysis of birth data for the calendar years from 2007 to 2011 has found the gender ratios at birth vary by mothers' country of birth," said health minister Earl Howe, the Telegraph reported.
The PD:control birth ratio showed a significant correlation with the crude influenza mortality for the year of birth during the period from 1900 to 1930 (Mattock et al.
The abortion to birth ratio was adjusted following a procedure suggested by Singh and Wulf to account for spontaneous abortion (10).
Right now, the World Health Organization estimates the male to female birth ratio in China at 117 to 100, whereas the statistical norm is 106 to 100.
There was no significant difference in the birth ratio of infants born to exposed and unexposed mothers (del Rio Gomez et al.
Replacing Myths with Facts" presents a review of existing studies on birth ratios and disproves myths about the practice of sex-selective abortion in the Asian American community.