LIFE & rebirth

When we take rebirth when does the old soul enter the body?

Sri Sri Ravi Shankar:

Rebirth happens! So many times we have died and taken birth. Soul can enter the womb at any one of the three times: at the time of conceiving, or the 3rd month of pregnancy, or at the time of birth. Many souls race and from these souls only one gets the body. In a race only one comes first, right? Sometimes, there are two then there are twins!