At the beginning of season four, Amy and Ricky are together and are trying to be a real family for their son.After the stillborn death of Ben and Adrian's daughter, Amy and Ricky begin a sexual relationship.Amy plans to go live with her grandmother Mimsy, but is unable to go after discovering that Mimsy is suffering from Alzheimer's disease, and is moving into assisted care living.
Ben proposes to Amy after finding out, because he genuinely loves her, and feels he would be a better father than Ricky due to his family's financial stability.
After Amy tells her parents, she contemplates having an abortion, as she is afraid of her peers' perceptions.
She changes her mind, but is still adamant about not returning to school.
Ricky reaches out to Amy during this time, saying that he wants to be involved with what happens to the baby.
Three months later, Amy moves herself and John into Ricky's little apartment over the butcher shop where he works.
Amy decides she wants to marry Ricky, but he thinks she's moving too fast.
She gives birth to their son, John, whom she lets Ashley name, and begins to struggle with motherhood.
After breaking up with Ben during her sophomore year, Amy briefly dates Jimmy, the son of her mother's ex-boyfriend, but their relationship ends after he finds a condom in her purse.
It explores how the pregnancy affects her, her peers, and her family.