Why do you want to?
There are many medications which can cause the uterus
to contract more vigorously and more often, but this is only indicated when something is going wrong with labor
, and the uterus is not contracting as strongly or as often as it should.
To "speed up" a normal labor means to risk decreasing blood flow to the baby, including to the baby's brain. This is not something you or your dr. Would want.