Worksheet 2 (part 1): Changes to the body - Boys' bodies

• Hormone production begins
• Sperm grows in testes
• Fine pubic hair may begin to appear

• Coarser, darker hair appears under the arms, around the pubic area, on the chest and on the face
• Emotional changes – uncontrollable emotions and mood swings
• Sweat and body odour becomes more noticeable
• Penis and scrotum get bigger and the shape changes

• Height and weight increases & muscles become more prominent
• Sexual desires develop and wet dreams start to occur
• Increased oil production can cause pimples
• Increased tiredness
• Erections start to occur
• Pubic hair continues to thicken and darken

• Height changes cease
• Temporary clumsiness can result from body shape changes (e.g. larger hands and feet)
• Voice breaks and deepens – could take one year to happen

Find out more about male puberty and the male reproductive system