The Best Months To Have A Baby, According To Science

Pencil it in.

Originally Published: 
Newborn Baby
Flickr / Margus Kulden

Past research has linked some diseases with birth month, like ADHD and having a chronically forgotten December birthday. But that doesn’t begin to compare with what Mary Regina Boland and her team of researchers at the Columbia University Medical Center uncovered when they looked at nearly 1,749,400 medical records of individuals born between 1900 and 2000. The study compared birth months to 1688 diseases and found the month was significantly associated with 55 of them, but only 19 of these had been previously reported on. And you thought you only had a birthday present to worry about.

Generally babies born in October and November have the highest risk of developing diseases, compared to spring and summer babies. But before you freak out, spring babies aren’t risk free and fall babies aren’t all bad either. Babies born in October were the most protected from cardiovascular diseases, followed by those with September and November birthdays, but infants born in April and May experienced the biggest multiple sclerosis risks. Summer babies weigh more at birth, grow taller, and experience puberty later (in girls) — all signs of good health — and yet they are more likely to be nearsighted. In other words, they were this close to not being nerds.

Though this seems like more of a mixed bag than the thing you carry diapers in, researchers suspect that it all has to do with the sun in some ways. Mostly, it mostly came down to vitamin D exposure during pregnancy. If that doesn’t stress you out enough, they also found that your partner’s birth month can impact whether or not they have a healthy pregnancy or delivery. Instead of obsessing over a birth month you can’t control — or worse, telling her to hold it — Boland advises individuals to focus on proven prenatal practices, such as a healthy diet, exercise, and prenatal vitamins (with extra vitamin D). Or, just burn your calendar because — seriously — this is ridiculous.

[H/T] U.S. News & World Report

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