sex ratio


Also found in: Thesaurus, Medical, Legal, Financial, Encyclopedia, Wikipedia.

sex ratio

n.
The proportion of males to females in a given population, usually expressed as the number of males per 100 females.
References in periodicals archive ?
There has been a steady decline in the Child Sex Ratio (CSR) across India, with 918 females born per 1000 males as per the Census of 2011.
If climatic changes continue to force the sex ratio bias of loggerheads to even greater extremes, we are going to lose the diversity of sea turtles as well as their overall ability to reproduce effectively.
SALE of two drugs that claim they can change the sex of a foetus has seen a sharp rise in Haryana, known for its skewed sex ratio.
They compared the two populations by analysing the sizes of individuals and the sex ratio.
The "equal investment hypothesis" (Fisher 1930) predicts that natural selection should favour equal parental investment in male and female offspring when the cost of producing individuals of each sex is similar and, as a consequence, an unbiased sex ratio at the population level is expected.
To estimate the sex ratio at conception, they examined data on nearly 140,000 embryos that had been routinely screened at fertility clinics in the United States and elsewhere for genetic problems.
Chandigarh: Amid huge fanfare, Prime Minister Narendra Modi on Thursday launched the nationwide Beti Bachao Beti Padhao (Save Girl, Educate Her) campaign from Panipat, in Haryana, in a determined effort to counter the adverse sex ratio in the country.
Therefore, a different technique should be used to confirm the sex ratio of the flow-sorted semen to reduce the error.
The skewed sex ratio is due to what Puneet Bedi, a Delhi suburb gynecologist, calls 'mass murder on an unprecedented scale.
A May 2011 study in British medical journal the Lancet found that up to 12 million Indian girls were aborted over the last three decades, resulting in a skewed child sex ratio of 918 girls to every 1,000 boys in 2011, versus 962 in 1981.
In the study, scientists have tested a new genetic method that distorts the sex ratio of Anopheles gambiae mosquitoes, the main transmitters of the malaria parasite, so that the female mosquitoes that bite and pass the disease to humans are no longer produced.
Eggs incubated under the constant temperature regime resulted in a heavily male biased sex ratio as predicted by the mean constant temperature model.