You might look at the conclusion of a research stu...  ...le as cuddling up because it's cold. We know that birth rates peak in September, but is that because it's cold...  ...holiday has more to do with it than the climate. Birth rates peak in September in the Southern Hemisphere, too...  ...hese peaks broadly...

[http://youtu.be/3IaYhG11ckA] (YouTube link)There...  ...o. However, the sex imbalance is more severe than birth statistics indicate, and varies over time and pla...

The birth rate in Brazil has dropped to historically low levels....  ...to historically low levels. The average number of births per woman is now just 1.9, and the drop has been...  ...lthough there are many reasons Brazil's fertility rate has dropped so far and so fast, central...

Given the low birth rates of some countries (I'm looking at you, Hong...  ...f 1,000 women is now expected to give birth to just 547 daughters. If nothing changed, those...  ...the territory would expect to see the birth of its last woman...