The trivia items below may give away important plot points.
Throughout various scenes, Abed can be seen in the background involved in an independent story-line. In it, he is seen talking to a woman in the late stages of pregnancy, and he puts his ear to her belly. He leaves her to go to the study group, but later is seen outside with the woman and a man who appears to be her boyfriend. The man confronts Abed and tries to attack him, but Abed runs away and the man is seen chasing after him. Later, they are seen again, this time in the cafeteria where the woman goes into labor and Abed and the man attempt to help her. Finally, they are seen outside again, where the woman is in the back of a van and Abed is helping her give birth. This is referenced later in S02E17 in which Troy asks him if he is "just constantly having your own side adventures" and Abed confirms that he does, and in S02E22 when Abed mentions that he had helped deliver a baby earlier in the year. In addition, this takes place roughly ten months after "The Politics of Human Sexuality" in which students are given faulty condoms and told not to use them if they have sex. A couple similar in appearance to the man and pregnant woman can be seen sitting in the background at the STD Fair.
Throughout the entire episode, a pregnant woman can be seen behind most of the characters in the most prominent scenes. In the first scene, Abed can be seen with his hands of the swollen belly of a blonde woman, toward the end - when Shirley says "skinny bitches!", the woman can be seen going into labor behind her, and during the oil fight, when guys are throwing money, Abed is delivering the baby in the back of a van. When Shirley tells Abed she hasn't seen him all week, Abed is watching a couple behind her with their new born baby.