Sex of girls and boys

Neuroscientists have known for many years that the brains of men and women are not identical. For the same kinds of tasks, females tend to use both their cerebral hemispheres more equally. Another difference is size: males of all ages tend to have slightly larger brains, on average, than females, even after correcting for differences in body size. Because they appear so early in life, such differences are presumably a product of sex-related genes or hormones. We do know that testosterone levels rise in male fetuses as early as seven weeks of gestation, and that testosterone affects the growth and survival of neurons in many parts of the brain.

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Are there any differences in the development of boys' and girls' brains?

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Jaipur : Child sex ratio at birth has increased to girls per 1, boys, Rajasthan's health department said citing data retrieved with the help of pregnancy and child tracking system PCTS. The child sex ratio at the time of birth was girls for 1, boys in and rose to in and in , a statement issued by the state health department said. As per the census, the sex ratio in the state was girls per 1, boys. Health Minister Dr Raghu Sharma said Banswara district topped with 1, girls per 1, boys in the state. In Churu, the sex ratio at birth was girls for 1, boys followed by in Barmer, in Hanumangarh and in Jalore," he said. In so far, sonography centres had been inspected," he said.
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In the end, families are happy to welcome their healthy new addition regardless of sex. The process through which gender is determined is called human sexual differentiation. All eggs contain an X chromosome, while sperm can have an X or a Y chromosome.
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