Answer:
Girl
At 13, many girls are going through puberty. A huge change in hormones brings about fuller breasts, wider hips and pubic hair. Your daughter's skin and hair will start making more oil and their height, weight and body fat will increase. Most girls also start their period.
Boy
Boy they may start to have erections for no reason, as well as “wet dreams.” They might notice breast buds developing. As your son's voice box and vocal cords start to enlarge, their voice will become deeper. You'll also notice that their hair and skin start to get oily and their face may break out
