After the Duggars return home from Asia, Anna invites the family over to tell them the news that she and Josh are expecting baby number three. Jana and Jill are studying to be midwives and spend an afternoon seeing patients, alongside a licensed midwife.

Jim Bob and Josh decide to take their health more seriously and challenge each other to see who can lose the most weight in 90 days. Meanwhile, Jason and the boys construct a greenhouse in the backyard for some homegrown fun.

Jim Bob and Josh get the results from their physicals, and they're in for some shocking news! Can Michelle and Anna keep them motivated to improve their health? And a visit from Anna's sister Prescilla, spurs Josh and Anna to look for a roomier home.

Jim Bob and Josh are in for a rude awakening when they meet their new trainer, who gives them the toughest workout of their lives. Meanwhile, Jill and Jana's midwifery skills are put to the test when one of their clients goes into labor.

Jessa and Jinger volunteer at a local coffee shop and have no idea what's in store. With Jinger being a big coffee fan, will she drink more than she sells? And Jackson and Johannah are drawing caricatures to collect funds for Josh and Anna's baby gift.

For his 18th birthday, Joseph leaves home for the first time to train with an emergency rescue team. Meanwhile, John David is one step closer to his pilot license when he flys Joseph to his boot camp. And Steve checks in on Josh and Jim Bob's weightloss.

For the first time, Jim Bob and Michelle talk candidly about marriage, babies and everything in between as they head off to a marriage retreat to build on their strong relationship. Meanwhile, can Grandma hold down the fort back home while they are away?

The Duggar household fills up fast when trainer Steve's family, along with Pastor Howard and his family come by for a super-sized dinner. We check in with Joseph on his emergency rescue training boot camp. And, Michael finally moves into his own room.

Jim Bob and Josh are hurting as trainer Steve puts them through their toughest workout yet. Meanwhile, Jordyn gets her tonsils removed, and Josh and Anna go in for an ultrasound that will reveal the baby gender, but only one person will know the results.

Josh and Anna head down to Florida to visit Anna's family and meet the latest family addition, her newborn nephew Paul. And after several weeks of training, trainer Steve pushes Jim Bob and Josh to their max, all leading up to the final weigh-in.

Josh and Anna are caught off guard when the whole family visits Restoration Church where Pastor Howard reveals some baby secret news! Plus after 90-days of training, a Duggar weight loss champ is crowned. And Josh and Anna reveal a life changing decision.