A new study suggests that having a second child causes plenty of havoc to a parent’s brain. But anyone with multiple children already knew that, right? As a matter of fact, science has now confirmed what moms and dads knew a long time ago: a second child can hurt a parents’ mental health. Here’s what you need to know.

Researchers from the University of Melbourne found that having more than one child might make you a pretty miserable person. The goal of the study was to see what happens to parents’ time pressure and mental health as first children are born, age and new siblings arrive.They shuffled through almost two decades of data from the Household, Income and Labor Dynamics in Australia Survey and found both parents showed improvements in mental health after having their first child. But here’s where it changes: a second child doubles parents’ time pressure. A second child can easily add stress to their lives and negatively affecting their mental health.

Tell us something we don’t already know.

Get this: despite all of the scientific information and the rising stress and blood pressure levels of moms and dads everywhere, they still want to have more children. As a matter of fact, the most ambitious discussions about having second children occur during a parent date night, and in between the first and second bottle of wine. Scientists say this is when the short and long-term impacts of children peer out from the distant future. We all know what the next step is, right?

To add more insult to injury, researchers further said that mothers experience higher stress levels when it comes to raising kids. Why? This is because females are more often than not given the child care responsibilities at home.

Despite all of this information, many couples still seem to be very enamored with the idea of parenting. That, and they continue to have children, despite all of the warning signs: they are loud, they are messy and worst of all, they are expensive to maintain. But we still love them anyway, right? They might make us miserable, but they also bring us plenty of joy. Most importantly, they make us feel complete.

READ NEXT: Second Born Child Most Likely To Be A Troublemaker