The three pregnant sisters are reunited for a big family birthday. Later, Joy goes into labor and after 20 hours, she is transported to the hospital for an emergency C-section. How will Joy and Austin handle this scary change of plans?

The Duggars celebrate Jana and John David's 28th birthday with a family ski trip. Meanwhile, Jinger & Jeremy tour a birth center and find out the gender of their baby. Later, Lauren goes shopping for the perfect wedding gown. Will she find "the one?"