Which statement best describes peak height velocity in girls in relation to menarche?

Which statement best describes peak height velocity in girls in relation to menarche?

• A. PHV occurs immediately before menarche
• B. PHV occurs after menarche
• C. Menarche occurs two years after thelarche
• D. PHV occurs earlier in boys

Answer: (A)

The main idea is that in girls the growth spurt peaks during puberty before the first menstrual period. The height-velocity peak occurs during the premenarchal phase, typically about one year before menarche, as hormones stimulate rapid growth and then growth slows down once menarche approaches and occurs. So describing PHV as occurring immediately before menarche best fits the usual sequence of pubertal events. Other statements miss this timing: PHV after menarche would invert the known pattern; menarche two years after thelarche tells us about the interval from breast development to first menses rather than the relation of the growth peak to menarche; and mentioning boys doesn’t address the girl's sequence of puberty.

The main idea is that in girls the growth spurt peaks during puberty before the first menstrual period. The height-velocity peak occurs during the premenarchal phase, typically about one year before menarche, as hormones stimulate rapid growth and then growth slows down once menarche approaches and occurs. So describing PHV as occurring immediately before menarche best fits the usual sequence of pubertal events.

Other statements miss this timing: PHV after menarche would invert the known pattern; menarche two years after thelarche tells us about the interval from breast development to first menses rather than the relation of the growth peak to menarche; and mentioning boys doesn’t address the girl's sequence of puberty.