During puberty, t here isn't just one event or sign that you're growing up. There are lots of them, including your body growing bigger, your voice changing, and hair sprouting everywhere.

If you decide to try lifting weights, first let your doctor know you are interested. He or she may tell you to hold off on weightlifting for a bit or give you some advice on how to start. If your doctor discourages weightlifting, try some other ways to work out. Resistance bands, which are like big rubber bands, are a great way to help build your strength without putting too much strain on your muscles. Public or Private? describes private and public places, appropriate behaviors and societal expectations. Sexual Maturity Rating 1: (The prepuberty stage) The testes are small and the phallus (penis) is child-like. There is no pubic hair. You can't help having wet dreams, and they are nothing to be embarrassed about. Almost all boys have them at some time during puberty. You may have already noticed some boys starting to get chest muscles (called the pectoralis muscles or pecs for short). Some may have broad shoulders (the deltoids, or delts for short). Other boys might still be slimmer and smaller.Sexual Maturity Rating 2: (From 10 years old to 15 years old) The testicles grow in volume and size. The penis has no or slight enlargement. The scrotum becomes reddened, thinner, and larger. A few pubic hairs become visible and they are long, straight, and slightly dark. MCQ Questions for Class 7 Social Science Geography Chapter 7 Human Environment: Settlement, Transport and Communication

Continued growth of the penis and testicles, as well as possible “wet dreams,” or ejaculation at night while they sleep. Body hair really gets going during puberty. Some boys will start to notice hair growing on their face around the chin, on the cheeks, and above the lip. Also, hair grows on the chest, the armpits, and even down there in the pubic region.Use this Human Reproduction Body Parts Activity to help children learn about the changes occurring to male and female bodies during puberty. What are the main physical changes during puberty? The stages of male puberty follow a definite path with a progression of physical changes. The timing of these changes, however, varies widely from person to person. Why is my penis so small (or so large)? With boys, the focus can be on the penis. Not all boys develop at the same time or rate, so your son may feel like he is too big or too small. His size will change as he continues to develop. Penises come in different sizes and shapes, but there are a lot less differences in size when penises are erect than when they're not.

Healthy Children, American Academy of Pediatrics: "Physical Development of School Age Children, "Stages of Puberty," "When Puberty Starts Early," "What's Happening to My Body?" An erection can happen even when you're sleeping. Sometimes you might wake up and find you had a "wet dream." A wet dream is when semen (the fluid containing sperm) comes out of the penis during sleep. Semen is released through the urethra — the same tube that urine (pee) comes out of. This is called ejaculation.Parents can typically ride out these issues. ( Read what a pediatric psychologist says about talking to your teen.)