Wisconsin Rep. Sean Duffy (R) said Monday he plans to resign from Congress on Sept. 23.

The congressman confirmed the news in a post on Facebook, attributing his decision to a family matter.

“Recently, we’ve learned that our baby, due in late October, will need even more love, time, and attention due to complications, including a heart condition,” Duffy wrote. “With much prayer, I have decided that this is the right time for me to take a break from public service in order to be the support my wife, baby and family need right now.”

Duffy, 47, has represented Wisconsin’s 7th for the past eight and a half years. Prior to that, he served as the Ashland County District Attorney, and was a cast member on MTV’s “The Real World Boston” in 1997.

Duffy and his wife, Rachel Campos-Duffy, announced in May they are expecting their ninth child sometime this fall. The two met while starring on a reality TV show in 1999.

In his post Monday, the representative called serving in Congress the “highest honor of my life.”

A spokesperson for his office didn’t immediately respond to a request for comment.