Jolene Ivey is a proud mom of five boys.
Her four youngest are still competing for her time and attention at home.
Her oldest son, now 18, is away at college.
"The first child is the only child for some period of time, and so you're going to spend all your free time with that child. But as more children come, you still have the same amount of time but you have more children to fill that time," Ivey said.
The study says between the ages of 4 and 13, firstborn children get 30 percent, or 3000 hours more quality time from their parents than their younger siblings