"I'm really excited," Jade says. "I'm going to cry."
Tanner revealed one great thing about having a daughter on the way is that the couple already has a name picked out for her. After hearing the baby's heartbeat, Tanner said it finally felt real that he's going to be a dad.
After the appointment, Jade told the camera she was going to send a package filled with pink items to both of their parents as a fun way to share the news.
The reality TV couple announced they're expecting their first child in early March, when they also disclosed the baby is due September 14, 2017.
Before Jade and Tanner discovered their baby's sex, Tanner told People in an interview, "I'm hoping for a boy, not that I don't want a girl. I actually want one of each. It's just I'm going to make her keep trying until we have a boy, so I'd like to get that out of the way sooner."
"He thinks I'm going to have four children if the first three are girls, but I think he's wrong on that," Jade said with a laugh, adding that they were "butting heads" when discussing potential boy names.
Jade and Tanner met on Bachelor in Paradise in Summer 2015, got engaged during the show's finale in Mexico, tied the knot in January 2016 for a televised special on ABC, and then hashed out their issues when they appeared on Marriage Boot Camp: Reality Stars late last year.