When I grow up I want to become a gynecologist.
Gynecologists are doctors who take care of women's health.
It requires extensive education and lots of years in college.
You need to know a wide range of Anatomy, Microbiology and Math
They do a lot of math. For example, they have to:
Find the diameter of the pelvis to find out how they will deliver the baby.
Calculate probable birth date using mother's last menstruation date (Negele Formula)
Figure out how long the pregnancy will be.