Its either angioplasty or IABP (Intra aortic balloon pump)
Vertex presentations mean the fetus is head-down in the birth canal. The fetus' head is presenting first.
The most logical answer is because adults have more experience driving than teens because most of the time, practice helps to make perfect. But there are some teens who are better drivers than adults and teens that aren't great at driving at all, and the same can be with adults!
I petty sure that it was cartoons.
Sorry if wrong.
Unintentional, Meaning not done on purpose or not thinking about it.
Hope that helps..