It is a very individual answer for varied reasons.  Type of birth/delivery or any complications, Pre-pregnancy fitness level, pelvic floor strength and even genetics can play a part.  There is no specific research that shows exactly how long women should wait to run after giving birth.  That is why it is critical to see your LWW Women’s Health team to tailor a plan just for you.   Experts say the amount of time it takes to return to pre-pregnancy fitness is directly related to the type of birth you experienced and how active you were before and during the pregnancy. The time frames can vary from 6 months to a year. The research and expert advise to take it slowly and build up gradually.