The series will follow Jessa (Duggar) Seewald and her husband Ben Seewald adjusting to life as new parents to 3-month-old baby boy Spurgeon, along with Jessa's sister Jill (Duggar) Dillard and her husband Derick Dillard continuing their missionary work with 10-month-old son Israel in Central America.
Back in Arkansas, siblings Jana, Jinger, Joy Anna, John David, Josiah and Joseph Duggar will also appear on the reality show.
In the promo, Jessa, 23, sports bangs reminiscent of Princess Kate's new mum fringe while caring for Spurgeon and reflecting on the Duggars' past struggles.
"Family is everything," she says.
"2015 was a very difficult year," adds another Duggar in a voiceover as Joy Anna, 18, sheds a tear.
VIDEO: Take a Tour of Ben & Jessa's New Arkansas Home
The ultra conservative family dominated the network's programming with the reality show 19 Kids and Counting until this summer, when news broke that Jim Bob and Michelle Duggar's eldest son Josh Duggar had inappropriately touched five underaged girls (including Jessa and Jill) as a teen. Shortly after, he admitted to cheating on his wife using the infidelity website Ashley Madison and checked into a faith-based rehab center in Illinois, where he remains.
Counting On premieres March 15 at 9 p.m. ET on TLC.