Transcript for 4-Year-Old Saves Her Mother's Life

And finally the Michigan mom has within person to thank for her life tonight. Quick-thinker who came to her aid with calm under pressure, fast on her feet and she's just 4 years old. Here's ABC John donvan with the little voice on the other end of that 911 call. Reporter: When they hand out medals this year, keep one in reserve for this 4-year-old named Calise manning. Because this is her voice. 911. This is Calise manning. Reporter: Here was the situation. At home in Kalamazoo, Michigan -- Somehow she fell, and I went to go see what happened. Reporter: Calise's mother, who has epilipsy, goes into seizures. That's what Calise is trying to explain. She's shaking and she's having a baby. Reporter: Oh, that's right. Her mom is nine months pregnant. And she's having a boy and she really needs help. How old are you, honey? 4. You're 4? Yes, and I'm almost getting bigger. Reporter: Well, here's the upshot. They got to the hospital by ambulance. Her brother T.J. Arrived safe and sound. And her mom was able to reveal they had practiced for this kind of emergency since Calise was 2. I teach her the address and my full name and now to dial 911. It was really good to ride in the ambulance with mom and she was really proud of me. Reporter: And the best thing about Calise manning being only four? It means she's just getting started. He's cute and I really love him. John donvan, ABC news. She certainly deserves a medal. "Gma" and "This week" in the morning. We'll see you right back here tomorrow night. Thank you for spending your Saturday with us. Have a good evening.

This transcript has been automatically generated and may not be 100% accurate.