Jim Bob Duggar and Michelle Duggar

Make that 20 Kids and Counting.

Jim Bob and Michelle Duggar are expecting their 20th child, they announced on their TLC reality show website. Michelle, 45, is due in April.

The first Duggar grandson is born

"Our whole family is so excited that God has blessed us with another child," they wrote. "Each one of our children are thankful to be here! Our goal is to teach & train them to love God and serve others." 

The Duggars are already parents to Joshua, 23; twins Jana and John-David, 21; Jill, 20; Jessa, 19; Jinger, 17; Joseph, 16; Josiah, 15; Joy-Anna, 14; twins Jedidiah and Jeremiah, 12; Jason, 11; James, 10; Justin, 8; Jackson, 7; Johanna, 6; Jennifer, 4; and Jordyn, 3, and Josie, 11 months.

Joshua has two, non-J-named children with his wife, Anna: Mackyzine, 2, and Michael, 4 months.

Watch clips from 19 Kids and Counting

Michelle suffered complications during her pregnancy with Josie, including preeclampsia, forcing Josie to be born three and a half months early. The Duggars call it "one of the scariest things we have ever walked through as a family."

"A lot of people have asked would we consider having more children after what we went through with Josie," they wrote. "We do not take for granted the wonderful blessings of life that God has bestowed upon us! Many years ago, Jim Bob & I gave this area of our lives to God, allowing Him to grant life as He saw fit."