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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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