SMR stage 1 for male sexual development is best described as

SMR stage 1 for male sexual development is best described as

• A. Pubic hair present
• B. Preadolescent with no pubic hair and 4 mL testes
• C. Scrotum enlargement
• D. Penis lengthens

Answer: (B)

Stage I represents the prepubertal phase of male development. At this stage there are no pubic hairs and the testes are small, around the low end of the normal pediatric range (about 4 mL). This combination signals that puberty has not begun. The other descriptions involve changes that appear as puberty progresses—pubic hair development marks the start of puberty, scrotal enlargement and the penis lengthening occur as maturation advances. So the description of a preadolescent with no pubic hair and small testes best fits Stage I.

Stage I represents the prepubertal phase of male development. At this stage there are no pubic hairs and the testes are small, around the low end of the normal pediatric range (about 4 mL). This combination signals that puberty has not begun. The other descriptions involve changes that appear as puberty progresses—pubic hair development marks the start of puberty, scrotal enlargement and the penis lengthening occur as maturation advances. So the description of a preadolescent with no pubic hair and small testes best fits Stage I.