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.

Lauren and Madison accidentally reveal Ricky's involvement with Amy to the school. Meanwhile, Grace is torn between forgiving Jack and moving on, and Amy experiences her first bouts of morning sickness.

Ben continues to pine after Amy, which results in them sharing their first kiss. Later, Amy shares the news of her pregnancy with Ashley—leaving their parents in the dark. Elsewhere, Adrian believes that Ricky is just using her for sex.

Ben's clingy behaviour begins to annoy Amy, who is also struggling to cope with her family life. Meanwhile, Jack seeks comfort from Adrian after his plans to see Grace fall to pieces.

Amy contemplates adoption for her unborn child. Meanwhile, Ashley and Amy attempt to persuade their father to not leave town, and Jack and Adrian grow closer.

Amy shares the news of her pregnancy with her mother, Anne. Later, Amy's absence from school sparks a rumour that she's having an abortion.

Ricky wrestles with the consequences of his actions. Meanwhile, Grace experiences difficulties with Tom, and Ben and Amy's relationship begins to sour.

Amy and Ashley's grandmother visits. Elsewhere, Adrian flaunts her budding friendship with Grace.

George bonds with Amy and Ashley. Elsewhere, Tom hires a "friend" for the night, and Lauren is caught kissing Ricky.

Amy faces her first day back at school, while Cindy Lee encourages Adrian to foster a relationship with her father.

Adrian's father calls the police after she disappears from school. Elsewhere, the school learns of Ricky's visits to Dr. Fields, Grace is pressured into wearing her purity ring, and Ben and Amy consider having sex.

Assisted by their friends, Ben and Amy marry in secret. Meanwhile, Tom asserts his independence after meeting a new girl.

The parents of Ben and Amy learn of the wedding, and the news leads to a brief reunion by George and Anne. Meanwhile, Adrian's father is bent on finding out who created the fake ID's.

Ricky's father comes to town with some advice for him on how to be a parent.

Amy has the opportunity to find out the sex of her unborn child. Meanwhile, Jack does community service and believes that he sees Bob violate his parole.

Amy and Ricky consider adoption as a possible option. Meanwhile, George's co-worker shows interest in adopting Amy's baby.

Ben and Amy's relationship hits a rough patch when Ben tells her that he needs some space. Amy is angry and sad at his decison and decides to give him a ring that she gets from Ashley in order to prove to him that she accepts him for who he is and loves him. Ashley and her argue and Ashley accuses her of wanting to give up the baby so that she can keep Ben. Ben has doubts about his relationship with Amy and thinks that she still has feelings for Ricky. Jack and Shawna argee to see each other. Lauren and Madison stand by Amy and Alice and Henry stand by Ben. Adrian and Grace argue over Ricky and get into a catfight, but become closer to each other as a result. Elsewhere, Grace's parents apologize to each other and Anne and George interview people who are interested in adopting Amy's baby,but George makes them leave before Anne gets a chance to talk to them because they want a closed adoption rather than an open adoption. Meanwhile, Ricky apologizes to Amy for him accidentally breaking up her and Ben. He talks to her about Ben and the baby, Amy gets upset, and Ben, Adrian, and Grace catch Ricky and Amy hugging. George's gay co-workers come by and talk to George and Anne about them wanting to adopt Amy's baby, and Amy agrees. Ricky tells Jack that he is through with both of Adrian and Grace for good and wants to be with Amy. Amy tries to pay Ben a visit but Ben's father intervenes."

Ashley tries his best to get Amy and Ben back together again, whilst Rick tries to sabotage the adoption process.

Adrian wants to mix things up a bit and tries to change her look, Jack is still bringing out his thoughtful side by raising money, and Anne might soon be off the unemployment list.

Amy gets help from her friends on what to do about the baby.

As Amy's due date inches nearer, Grace and Adrian decide to throw a baby shower for her. While preparing for the party, Jack and Grace have a moment where they reconnect.

Amy goes into labor and she and Ricky keep looking back to when they first met at band camp and how Ricky charmed her into having sex with him. Tom tries to get Jack and Grace together again, and Adrian discovers she still cares for Ricky.

Amy has trouble adjusting to life as a mom as she gives birth to her baby. Meanwhile, Ricky likes fatherhood and becomes friends with Ben; and Anne is surprised when George and Ashley decide to move out.

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.

Grace is struggling with what has happened, whilst Ben wonders what part he plays in Amy's new life.

When Grace begins to pull away from everyone, Ricky takes it upon himself to try to help her out.

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 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 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.

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

Adrian makes an attempt to get George and Anne reconciled, but only for her own selfish reasons.

Adrian and Amy's fighting escalates and Ricky intervenes.

Amy attempts to keep Ben's attention. Meanwhile, Grace makes an impression on Adrian.

Amy is jealous when Ashley gets her own room in the garage, while Ricky pursues Adrian but she claims to have moved on.

George gives Ricky and Ben some much needed advice. Ricky and Adrienne go to couples therapy and Adrienne shares a very personal story explaining why she wants commitment so badly. Grace continues to argue with her mom over dating so soon and decides she isn't ready for a serious relationship herself. When Anne goes into labor they come to the conclusion that they won't make it to the hospital in time so George, Amy, and Ashley are forced to deliver the baby at home. Adrienne and Ricky spend the night together and Ricky finally says the words Adrienne has been waiting to hear. Meanwhile, back at the Jeurgens household George comes to a shocking discovery about the baby.

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

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

Relationships are on edge, with Ben and Amy dealing with their own relationship drama, as well as Adrian and Ricky and Grace and Jack.

Grace's love of self-love comes out at school in the form of a campaign called "Just Say Me". Which has girls all across school abandoning sex with guys in favor of a more personal activity that has the same end result.

Meanwhile, Adrian's own campaign of trying to be Amy's friend bears fruit when Amy invites her over for a visit.

Amy goes on a date with Jimmy. Meanwhile, Ashley pursuades George to vist Anne to rekindle their relationship, and Griffin sends his cousin Grant to get to know Ashley. Ben visits Grace and tells her that he wants to be friends, and as he leaves, they kiss. At the same time, Amy and Jimmy kiss. After George knocks on Anne's appartment door, Josh answers and explains Anne is with Mimsy and might come back home. While Ricky encourages Amy not to get caught up with Ben and Grace, Adrain's parents tell her they will get married, therefore causing her mom not to take the job offer in New York. Anne tells Ashely that she doesn't think it would be good for her to return 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.

George and Ruben finds out that Ricky and Amy kissed. While at the mother daughter dance, rumors fly around fast, as Anne, Ashley, Grace, Amy, and Adrian discuss each other's personal relationships with each other. Ben tells Henry and Alice that the reason why he broke up with Amy is because if he did hve sex with her, he was afraid that he would get her pregnant. He also tells Leo that he wants to get back with Amy. Meanwhile, at the mother daughter dance, rumors fly around that George and Anne will get married again. Elsewhere, Adrian asks Ben if he needs company and Ricky sends Adrian a text message saying that he loves her.

Amy visits Jimmy to learn why he never called her; Adrian makes a confession to Ricky.

Ricky takes time to track down his biological mother and confront her about his abusive childhood. Elsewhere, George wants to modernize his look by getting a makeover. Things are still tense between Adrian and Grace, and Jack breaks up with Madison after learning something about her. Also, Amy has a meltdown after a run-in with Ben, who is still trying to decide if he really wants her back.

Ricky, Ben, Amy and Adrian attempt to work out differences.

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.

Mimsy returns, and a wedding is held.

Ben thinks Adrian is lying about being pregnant and doesn't act like himself. Elsewhere, Jack finds out his family is moving and thinks about not moving with. Also, Ashley has a talk with her doctor about birth control.

Amy is received into a music program in New York City but, she concerns it's too far away to actually be able to move. In the meantime, Jack has to detect a place to live aft he chooses not to move with his parents.

Ben decides to try his hardest to keep his secret from Amy and cut himself off from Adrian, but things become complicated when his father tells Adrian's father about the pregnancy. Meanwhile, Amy is pleasantly surprised to find that her family and friends are pushing for her to attend the music program in New York. Also, George and Anne continue to argue, specifically about some of Ashley's most recent decisions.

After Amy leaves for New York, Ricky moves into her house temporarily to take care of John, which doesn't please Anne and George, since something appears to be going on between Ricky and Ashley. Elsewhere, Adrian goes to her mother for advice on what to do about her pregnancy, and her parents' differing opinions threaten to split their family apart. Ben also wrestles with the reality of the situation and vows not to let it ruin his future with Amy.

Band geeks are spreading rumors through the school that Amy is pregnant again. Ricky is especially furious with these rumors and insists they aren't true. Later, when Ricky and Ashley are alone, they kiss! Ricky backs away and hurries out of the room. Meanwhile, in New York City, Bristol Palin shows up at Amy’s dorm room and Amy finds out that all of the girls in the music program are teen mothers.

Adrian meets Ricky's mom at the clinic and admits to her that she does not want to be a teenage mother but after talking, she has a change of heart and tells Ben that she will not go through with the abortion. When Ricky gets a call from Amy, he hangs up and Ashley receives a text message from Adrian, saying that she will have the baby. Ashley, therefore, tells Anne and George, and also attempts to convince her parents to withhold the information from Amy until after Ben tells her. When Ben and Adrian visit Grace to tell her the news, Tom overhears the conversation and relays it to Jack. Ben and Jack both tell Madison about Adrian's decision, and she attempts to tell Ben to tell Amy before anyone else does.

After agonizing over the situation for far too long, Ben travels to New York so he can tell Amy about the baby before she hears it from someone else. Also, Ricky spends some time with his biological mother, who is 24 hours away from serving a jail sentence. Adrian spills the beans at school about her pregnancy in an unusual way, and Ashley thinks she might be in love with the wrong person.

Amy has not been taking anyone's phone calls for three days, and Ben is not handling it well, leading Grace to believe that she might have another chance with him. Meanwhile, George plans a romantic evening with Anne, and Ben accompanies Adrian to her first doctor's appointment. The tension continues between Ricky and Ashley, and Ricky approaches Ruben with a special request. Lastly, Amy contacts Adrian to offer her friendship and support.

While, Grace tries to find a boyfriend for Griffin, Ashley now has feelings for both Grant and Ricky.

Ricky goes to visit Amy in New York. Meanwhile, Ben goes with Adrian to a sonogram appointment. Jack is torn between letting Madison sleep over and Grace continues to build her relationship with Grant.

Ben and Adrian are thinking about engagement but both have Ricky and Amy in mind when making their decisions while Amy's parents tell her that they plan to remarry. In New York, Amy's fellow teenage mothers take her out for her birthday.

Amy calls Ricky to let him know she's angry that everybody, including her parents, have forgotten her birthday. Meanwhile, Adrian has a medical scare with her pregnancy, which leads to some problems with Ben, and Grace's relationship with Grant heats up. Madison's father finds out some unsettling information about his daughter's sex life with Jack, and as Leo gets angrier with Ben, he gains some perspective on his own marriage.

As Grant and Grace grow, Amy and Ricky try to find out if they should be a couple.

Ashley tries to persuade Ricky to have sex with her and Amy takes a stance against her actions. Anne questions whether George actually wants to get married, contrary to his original claims, and suggests that they finally spit up without hurting their children. Elsewhere, Adrian believes that Ricky is just using Amy for sex and Grace wonders if Adrian is considering marriage. Meanwhile, Amy goes out with Ricky; and Grace and Grant prepare for camp.

Amy wants Ricky to get tested for various STDs, after she sees him talking to someone he used to date. Ben and Adrian's baby's gender is revealed. Amy considers having sex with Ricky.

Jesse makes some decisions about his and Lauren's relationship, now that he is headed for college. Madison becomes interested in a new guy... her boss who is in his mid-20s. Grant tells Grace that he wants her to be tested for STDs before they consider having sex.

Ricky finds out that his mother is dating a woman, Ashley's homeschooling isn't going very well, and Ben asks Ruben and Cindy a question.

Both Amy and Ricky feel under pressure now that Ben has proposed to Adrian, which causes Amy to suggest taking their relationship to the next level. Ben suggests an alternative to a big wedding to Adrian, and Lauren's mother and step-father are having problems.

Ashley starts being home-schooled. Ben and Adrian look for a place to live. Grace worries about the future regarding her relationship with Grant. Jack & Madison take a break from sex. Lauren is crushing on a new guy.

No one is happy about Amy's plans to move in with Ricky -- including Ricky. Leo encourages Ricky to think about college, and Anne accuses Amy of rushing things with Ricky as a way of competing with Ben and Adrian. Madison is uneasy with Jack's decision not to have sex with her, and Grace asks her mother for a sleepover with Grant.

Grace and Adrian shop for a wedding dress, and Amy is cornered into planning a baby shower for Adrian. Grace and Grant have relationship problems.

The entire town is in an uproar over Adrian's impending baby shower.

Adrian hosts a baby shower. Lauren, Madison, Amy, and Grace all attend. Ricky finds out that Leo is having problems with stress.

Adrian makes plans to come back to school a week after the birth of the baby in order to stay on track for graduation. Adrian and Ben both have misgivings before the wedding, and Ricky realizes that romancing Amy may be more effective than pressuring her for sex.

Amy is upset that Ricky is the kind of guy that could never get married, after she realizes Jack has a key to his apartment and she doesn't. Ben and Adrian's wedding reception is held at the school.

Adrian and Ben prepare for the imminent arrival of their daughter. When Adrian experiences discomfort, the couple - believing she is about to go into labor - are instructed by their doctor to leave for the hospital. Ben and Adrian agree not to call anyone until they know more, but as word spreads she is in the hospital, family and friends gather there to share the joyous occasion. But the couple learn some devastating news that will change their lives forever and will need those closest to them for support.

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.

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

Grace goes away on a medical mission, while Peter suspects the worst.

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.

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.

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

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 has a new goal in mind.

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

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.

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

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

Summer school is the backdrop for another series of intrigues: Amy, Madison and Lauren argue, Henry is in the doghouse with both Ben and Alice, and someone is found to be trying pot.

Kathleen struggles with a decision whether or not to allow a boy from the country to stay with them instead of attending boarding school

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.

Ben and Dylan go on their first real date together. Elsewhere, Tom runs into problems with police.

A desperate Kathleen resorts to bribery to get Grace to talk to Jacob. Elsewhere, Dylan attempts to befriend Adrian.

Amy learns she's doing poorly in summer school, so her dad tutors her and provides her with some life advice.

Amy announces a wedding date, and the news travels quickly. Meanwhile, a rumor concerning Anne surfaces.

Amy's mistaken about why she's the focus of gossip, and Grace grows jealous of her. Elsewhere, Ashley and her mom return from traveling abroad; and Ben asks his father to let him enroll in Dylan's school.

In the fourth-season finale, Anne reveals some news to her loved ones. Meanwhile, Ben considers transferring to Dylan's school.