system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Second stage of labor stas from: March 2013
assistant
The correct answer is  Ans. C i.e. Full dilatation of cervix Stages of labor 1st stage: Onset of labor to dilatation of cervix - 6-20 hours in primigravida - 2-10 hours in multigravida 2nd stage: From full dilatation of cervix to complete bih of baby 3rd stage: Bih of infant to delivery of placenta