Can you please tell me about the safe periods of a girl when it is safe to have sex?

There are NO Safe periods. There is always a chance to get pregnant - yes, at certain times of her cycle the chances decrease and at other times they increase BUT THERE IS ALWAYS A CHANCE!!

USE A CONDOM!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

you can believe 45% out of 100%.. usually ovulation occurs on the 14th day of the menstrual cycle.. or either side of the day of ovulation.. so it is not safe to have sex before and after 3days of the menstual cycle.. but she shud have a regular period.. clues to find out when she is ovulating:- body temperature slightly increases during the time of ovulation..

it is safe to have sex 7 days after the last day of your period and 7days before your period due