How many push before your #1 is born?

when about 9-10 cm, midwives told me to push a few times so that they can see more of the bb crown. Once that happen, they called in the gynae within 15min and gynae will guide when to push according to the contraction chart. he will say take a deep breath and slowly breath out and push when contraction at peak. less than 5 times, bb just slip out.