Epidural right time

Hi, i heard depend on the hospital some 6cm cannot take already some as early as 4cm. So once you admitted just check with them if you plan to take epi. I would recommend taking at the time the contraction pain is there, so when they want to poke always tell them to poke once u feel the contraction then u won't feel much of the long needle pain. Because example you admitted at 1-2cm and you still don't feel much of the contraction pain and u requested for epi, u can feel the needles poking. Epi needles and dosage differ from normal needle injection ya.