Which hormone is primarily responsible for the development of secondary sexual characteristics in females?

• A. Progesterone
• B. Estrogen
• C. Testosterone
• D. Luteinizing hormone

Answer: (B)

Estrogen is the hormone primarily responsible for the development of secondary sexual characteristics in females. It plays a crucial role in the growth and maturation of female reproductive organs, the regulation of the menstrual cycle, and the development of breasts and body shape during puberty. Estrogen promotes the deposition of fat in specific areas such as the hips and thighs, which contributes to the typical female body contour. Additionally, it affects the development of pubic and axillary hair.

Other hormones like progesterone, while important in regulating the menstrual cycle and supporting pregnancy, do not primarily drive the development of secondary sexual characteristics. Testosterone, although it is present in females and has some influence, is more dominant in males and does not lead to the same development of characteristics seen specifically with estrogen. Luteinizing hormone is involved in regulating ovulation and menstrual cycles but does not directly influence the development of secondary sexual traits in females. Thus, estrogen is the clear answer when discussing the hormonal basis for the secondary sexual characteristics unique to women.