Being a parent is bad for your blood pressure

Tests carried out on more than 2,500 people from Edinburgh and Glasgow have shown that parents are more likely to suffer from high levels of cholesterol and blood pressure.

Of those people with children, 53% suffered from high blood pressure, as against 41% of those without children. Similarly, parents suffered from around 6% more cholesterol.
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[T]he difference in cholesterol levels between those with children and those without could be explained by the lifestyle choices parents make in comparison to childless couples.

"People without children are more likely to go to the gym and eat healthily," he said.

"Harassed mothers with young children are more likely to be in too much of hurry to do that and may even be eating the kind of food their children like, which tends to be higher in fat and salt."