It was a normal spring day at Lakewood Elementary School when Mr. Ratburn had an announcement to make. "I am handing out these permission forms that your parents have to sign. It is regarding next week's health unit, reproduction. For homework, I want you guys to write a 2 page essay on what you already know about where babies come from."

At lunch, Arthur stated, "I can't believe Mr. Ratburn wants us to write two whole pages on where babies come from." Buster exclaimed, "I heard that babies come from space, a big alien brought the baby down in a big spaceship." "Buster", Arthur snapped, "that is not true; my mom explained it to me when DW was born. The dad puts a kind of a seed in the mom and the baby grows in the uterus." The Brain then explained, "That 'seed' your mom must have been talking about is actually lots of microscopic sperm that comes out of the dad's penis. They travel up the mom's vagina, into the uterus, through the fallopian tubes, where an egg waits. The sperm fertilizes the egg, and a baby is conceived." Muffy is then grossed out, "ew". The Brain states, "It is not gross, it is interesting how something so small grows into something as big as a baby in just 9 months."

That evening, Francine does not feel well. She is unable to eat dinner, even though it is spaghetti, her favorite meal. Her mom asks, "Francine, are you feeling well, you have not touched dinner." Francine replied, "May I be excused, I am feeling a bit sore", as she rubs her lower abdomen. She then goes into her room. When Catherine finished dinner, she went into her and Francine's room. She asked, "Are you ok, you did not eat your dinner." Francine replied, "Well, I have been feeling a lot of pain down here, and I just don't feel well." Catherine realized what was going on. "You must be getting your period. Soon you will notice blood in your underpants, it will last for about a week, then you will be just fine for a month, then it will happen again. I will give you some of my pads, but then you will have to tell mom about it."

It was the start of the reproduction unit at school. Mr. Ratburn was returning back the papers that the kids wrote the week before. "Mr. Powers very detailed! Mr. Read, nice story about the birth of DW and Kate. "When he got to Buster's desk he stated, "Mr, Baxter, who told you that babies came from space?" Mr. Ratburn then announced, "The boys will stay here with me, while the girls will go to Miss Sweetwater's class. The boys from Miss Sweetwater's class will come here."

In Mr. Ratburn's class, the boys had to memorize the different parts of the reproduction systems, while the girls in Miss Sweetwater's class had to watch a video about a girl getting her period at a sleepover.

At recess, Muffy tells Francine that she is nervous about getting her period. "I am afraid it will mess up my designer jeans", she stated. Francine reassured her, "I got my period last week; it is not that bad. You should tell your mom to get you some pads so you will be ready for when it happens."