secondary sex characteristics
Non-reproductive dimorphism
Secondary sex characteristics are physical traits that distinguish males from females but aren't directly involved in reproduction.
They develop at puberty under hormonal influence: breasts and wider hips in females; facial hair, deeper voice, and broader shoulders in males.
Unlike primary sex characteristics (genitals), these features signal sexual maturity without serving reproductive functions directly.
Beard, mustache, stubble
- beardFacial hair growth
- mustacheUpper lip hair
- body hairMammalian surface strands
- chest hairFollicles on the torso
deep voice · broad shoulders · musculature · testosterone · muscle mass · jawline · stubble · virilization
Mammary tissue areas
- hipsLeg-torso joint areas
- curvesBends in a line
- estrogenFemale reproductive hormone
- progesteroneOvarian steroid supporting gestation
areola · nipples · lactation · bust · fat distribution · soft skin · voice pitch · subcutaneous fat
Sexual development stage
- growth spurtPeriod of accelerated physical development
- voice deepeningPitch lowering with age
- menarcheOnset of menstruation
- adrenarcheAdrenal cortex maturation onset
pubic hair · acne · oily skin · sweat glands · pheromones · hormonal changes · precocious puberty · delayed puberty
facial hair
Beard, mustache, stubble
chest hair · deep voice · broad shoulders · musculature · testosterone · muscle mass · jawline · stubble · virilization · brow ridge
breasts
Mammary tissue areas
progesterone · areola · nipples · lactation · bust · fat distribution · soft skin · voice pitch · subcutaneous fat · mammary glands
puberty
Sexual development stage
- growth spurtPeriod of accelerated physical development
- voice deepeningPitch lowering with age
- menarcheOnset of menstruation
adrenarche · pubic hair · acne · oily skin · sweat glands · pheromones · hormonal changes · precocious puberty · delayed puberty · growth plates
secondary sex characteristicsgonads
Gamete-producing glands
genitalia · reproductive organs · sex organs · reproductive anatomy · ovaries
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