After losing her virginity to Ricky Underwood at band camp, Amy Juergens discovers that she's pregnant. As Amy contends with her family life, and struggles to come to terms with her pregnancy, she seeks solace from her friends, Lauren and Madison. Meanwhile, Grace Bowman, the most popular girl at school, promises abstinence to her parents.

With the help of Amy, Ricky tries to get in to college. Grace is having trouble fitting in to Daniel's college life.

Amy copes with the rigors of motherhood while Anne adjusts to the news that she is pregnant. Elsewhere, a tragedy takes place just as Jack and Grace's relationship intensifies.

As Ben continues to examine his options, he and Adrian have a huge blowout. Adrian finally gathers the courage to take all of the baby's things out of the would-be nursery.

Adrian comes to Ben's defense as a bunch of students begin to blame him for their daughter's death. Kathleen has an interview at a college. Grace gets pranked by Ricky.

Nora finds a new place to live, Ricky has an unexpected visitor who has run into legal problems after texting nude photos of his girlfriend, and Grace plays matchmaker

It's graduation day - and both Ricky and Jack have something to say. A divorce attorney obtains incriminating photos at the graduation ceremonies.

Most of the gang ditch classes and are pursued by the new school counselor; Amy and Anne take a mother/daughter vacation.

There's an emergency with John resulting in Ricky & Amy taking him to the ER. Grace meets a new guy named Daniel. Adrian wants Ben to tell her how he really feels.

Adrian has a new goal in mind.

Adrian is in a deep depression, refusing to leave the house, while Ben struggles to keep it all together after losing their baby. Ben has returned to school, but is devastated and angry about the situation. Ben asks Amy to visit Adrian at home to help her through this difficult time. Meanwhile, Amy feels a little guilty for being so happy in her own life – she’s in love with Ricky and their relationship seems to be growing stronger by the day. Ricky insists they shouldn’t feel guilty and invites Amy and John to move in with him.

It's time for senior prom!! Amy is mad that Ricky doesn't want to go so she pressures him into taking her to prom. Adrian and Ben go together, and Amy finds out Adrian is trying to get pregnant. Later, after the dance Adrian tries to seduce Ben into sleeping with her so she can be prego and keep him in the marriage.

Adrian is introduced to the brother of one of Daniel's friend, and sparks fly. Amy hopes for a proposal from Ricky -- who has a surprise of his own.

Mid-Season Finale: A marriage is on the rocks. The wife is going to college and files for divorce -- and it's not Adrian. The seniors prepare for graduation.

Amy and Ricky are now engaged, but Amy starts to consider what marriage may really mean.

Amy is having trouble copy with her hectic lifestyle now that she has school and a baby to look after. Ben begins to decide how he will be spending his summer break.

Amy refuses to let Ben come over to say goodbye to her and John for the summer, but instead allows Ricky to take John to his new appartment. Marc Molina, the school guidance counselor, resigns at the end of the school year, while Anne starts pushing the divorce after she decides to accept David's marriage proposal. At the same time, Ashley reaches a breaking point urging George to tell Anne that the baby is his and Grace gets accepted into a medical school for the summer. Upon packing, Ben confronts Leo about Betty, but Leo reassures Ben that he trusts her. Meanwhile, Ricky is at Amy's house picking up John for the night, and Ben comes over to say goodbye to Amy. Ricky walks in on Ben and Amy kissing, but Ben gets angry and leaves.

A messy custody battle ensues as Amy and Ricky continue to disagree over their rights as John's parents. Still angry with Ricky for breaking up with her, Adrian sides with Amy and encourages several of their friends to do the same. Elsewhere, George grows more frustrated with Anne's refusal to get re-married right away. Ben and Grace get closer, and Ashley feels ready to make some changes in her life.

Betty applies her own brand of comfort for Adrian's mourning. Ashley decides to go ahead with her cross-country road trip.

Amy tells her mother that she will go to Italy with Ben, while Ashley delivers the message that Anne and David are engaged. Grace tells Tom and Adrian that George told her that he lied about the vasectomy, and the secret flies around the school, only to arrive at Amy, who asks Ashley if George told the truth. Meanwhile, when Ricky asks Leo for a raise, Leo gives Ricky the apartment above the butchershop and the raise, and David asks Anne to move into their own home.

Amy fears that Jimmy's standoffish behavior is a result of her bad kissing, so Ricky offers to help her practice, which ends up being a bad idea. Elsewhere, Adrian's parents are planning a quiet, low-key wedding at home, and Ricky is hesitant to introduce everyone to his foster parents. A mother-daughter dance is being planned at school, but most of the students have strained relationships with their moms at the moment. Lastly, Ben must decide whether to continue pursuing Grace, and Anne suggests therapy as a final attempt for her and George to keep their family together.

Everyone has returned from summer vacation, and George tells Anne a big revelation.

Anne encounters an old flame causing Amy to be attracted to his son.

Amy is increasingly short with everyone in her life, including Ricky, leaving him wondering what is going on with her, but he is not prepared when she reveals that she might be pregnant again. Ben, determined to get permission from Dylan's parents to see her, makes another attempt to win them over, but it doesn't turn out quite like he hoped when he ends up sharing too much information about his family. Grace is unsure how to react to her mother's shocking news about the secret her father kept from everyone and turns to Jack for support. And, Anne's evening with Nora raises questions for George.

Dylan and her pals surprise Ben at school, while Grace doesn't want Jacob attending school with her. Elsewhere, Kathleen tries to understand her late husband's secrets; and an overburdened Amy acts ornery at home with Ricky.