The gifts have been opened, but a special package may be arriving 9 months from now. The days between Christmas and the start of the New Year see more sex than usual, reports McClatchy Newspapers, which cite Trojan condom's pre-New Year's sales as proof. The hanky panky results in a September peak in US births, according to the University of Michigan's Population Studies Center.
Analysts attribute the bump to New Year's resolutions to have children, extra free time, and a bit of holiday excess in general in the form of booze and partying. Americans aren't the only ones getting hot and heavy between now and Jan. 1. One German researcher described the holiday conception uptick as "characteristic of all Christian cultures."