I have my own business http://naukrifunda.com/stmap_31fqfoiz.html?pantoprazole.cialis.nevirapine.lioresal crestor 20 mg precio peru Whether a typical birth will yield a boy or girlâassuming no twinsâstarts out like a loaded coin flip: Boys are, on average, more common with about 105 boys born world-wide for every 100 girls. Then there are the factors that yield slight differences. Some countries have higher or lower sex ratios, defined by biologists as the ratio of male to female births. Older parents tend to have more daughters than younger ones. Wealthier families have more sons than poorer ones. Birth order matters, too: The more children a mother already has had, the more likely her next child is to be a daughter.
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