gd mrng sir,my girl fren suffering from delay in her mestural cycle,we didnt have unprotected sex,even her urine preg report comes negative...i cunsult md gyaeno..and he adviced me to give her regestetone 5 mg for 5 days,she is taking the medicines from last two days,bt still not geeting any singh and sypmtoms of period..so plz advice me