Which of the following factors affect the onset of menarche?

• A. Adiposity only
• B. Genetics only
• C. Nutritional status only
• D. Genetics, adiposity, chronic illness, nutritional status, physical and psychosocial environment

Answer: (D)

Pubertal timing, including menarche, is controlled by a network of signals that reflect both a person’s biology and their environment. The hypothalamic-pituitary-gonadal axis responds to energy status and body fat through hormones like leptin and growth signals, so adiposity and nutritional status help set when puberty starts. Genetics provides a baseline tendency, but actual timing is modulated by health status—chronic illness or significant energy restriction can delay onset. The physical and psychosocial environment also plays a role; stress, family dynamics, and broader environmental factors can influence puberty timing through hormonal pathways. Because all these interconnected influences shape when menarche occurs, the comprehensive set of factors—genetics, adiposity, chronic illness, nutritional status, and physical/psychosocial environment—best explains the onset.