According to a new study, men tend to gain weight and build a higher body mass index after becoming fathers. 

The research was published in the American Journal of Men's Health, and indicated that weight gain differed between men who live with their children and those who do not.

For example, a 6-foot tall man who lives with his children gained an average of 4.4 pounds, whereas one who didn't, gained 3.3 pounds. A similar man who is of the same build and height who did not have kids during the same time lost 1.4 pounds.

The study began in 1994, where 10,253 men were examined for BMI measurements between early adolescence and into their 30s. Control factors included age, race, income, education, health, and marital status. 

While the findings could be considered "conservative," they are indicative that fatherhood is an important transition for men's' health in general and can affect their children's perceptions of health in the future.

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