Make sure you've got contraception-- you're more likely to get knocked up this time of year. Writing for The Conversation, Professor Michaela Martinez from Columbia University and Kevin Bakker from the University of Michigan say it's the temperature that makes it more likely to conceive in the winter. They write, "It turns out reproduction is seasonal across all living organisms, from plants to insects to reptiles, to bird and mammals-- including human beings." The phenomenon is known as "birth seasonality." The researchers explain, "Globally, popular birthdays follow a similar pattern with peaks occurring earlier in the year the further north you get from the equator-- for instance, Finland's is in late April, while Jamaica's is in November. And in the U.S., states further south, like Texas and Florida, experience birth peaks that are not only later in the year, but also more pronounced than those seen in the North." It turns out day length has the potential to influence human fertility, as does social status, and changes in the standard of living. Also, seasonality may play a role in disease prevention, as babies get some immunity from their moms, but only for the first three to six months, and infectious diseases tend to peak in the winter and spring months.

SOURCE: (The Sun