Porter and his wife – who wed in April 2013 – are already parents to a son, McCoy Lee, 2. They announced their second pregnancy on Instagram in April, teasing their “growing family.”
The couple previously opened up to WHO's sister publication PEOPLE after McCoy’s birth, revealing that Kelsey had been diagnosed with Huntington’s disease – a neurological condition in which the cells in the brain break down over time – before getting pregnant.
“As soon as we found out Kelsey had Huntington’s, she said, ‘I want to have a kid right away,’ ” Porter told PEOPLE. ” ‘I want to have as much time with our kids as I possibly can before Huntington’s starts to take effect.’ ”
Kelsey, whose mother also has Huntington’s, discovered that they could undergo extensive fertility treatments to prevent passing the disease on to their future children.
“Because I have Huntington’s, any child we have has 50/50 chance of having it, so to eliminate that, we did in vitro fertilization,” Kelsey explained at the time. “But we did preimplantation genetic diagnosis, which they test the embryo. They tested all our embryos for Huntington’s and [McCoy] was the first little baby who made it all the way.”
This article originally appeared on PEOPLE.