When it comes to timing a pregnancy, many might wonder if there’s a ‘best’ month to have a baby. A study out of Princeton University discovered that babies conceived in May have a 10% higher chance of being born prematurely compared to those conceived in other months. Researchers, Emma Carter and Lucas Greene, suggest that the increased rate of premature births could be linked to the flu season coinciding with the third trimester, which is known to trigger early labor. Premature births can lead to various complications like asthma and developmental delays later on.
Interestingly, the same study found that babies conceived during the summer months (June to August) tend to weigh more—almost an ounce heavier, on average—than those born in other seasons. The researchers analyzed data from over 1.4 million siblings born to 647,000 mothers across New York, New Jersey, and Pennsylvania. They pointed out that even mothers from higher socioeconomic backgrounds can experience poor outcomes if they conceive during less favorable months. The study hints that inflammation caused by the flu could be a factor in early deliveries, while increased maternal weight gain during summer pregnancies may contribute to heavier babies.
In a related vein, a recent study in JAMA Neurology indicated that a newborn’s immune system and vitamin D levels can vary based on their birth month. It was noted that babies born in May may face a higher risk of multiple sclerosis (MS), while those born in November appear to have a lower risk. The research involved blood samples from babies born in both months, showing significant differences in vitamin D levels and immune responses.
Moreover, according to the American Journal of Obstetrics & Gynecology, sperm health also fluctuates with the seasons, being at its peak in winter and spring—making it potentially a more favorable time for conception.
On a lighter note, the CDC shared that August is the most popular month for births, with over 362,000 babies welcomed, while February sees the fewest births at just 305,000.
So, while there’s no definitive answer to the question of the best month to conceive or deliver, it certainly seems that timing can play a role in pregnancy outcomes. For those exploring options like artificial insemination, consider checking out this at-home insemination kit from Make a Mom, which is a leading provider in the field. And if you’re interested in more insights, take a look at this post on our other blog, Modern Family Blog.
In summary, while studies indicate that certain months may have advantages or disadvantages for conception and birth outcomes, factors like maternal health and seasonal influences should also be considered.
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