PHS 4300 Lecture Notes - Lecture 6: Secondary Sex Characteristic, Twin, Pubic Hair
12 Nov 2018
School
Department
Course
Professor
Document Summary
Primary sex characteristics: the production of eggs and sperm and the development of the sex organs. Both male and female organs increase in size and weight. Secondary sex characteristics: bodily changes of puberty not directly related to reproduction: often similar for males and females, but to different extent (e. g. , bodily hair, pubic hair, facial hair, skin changes, breast development) Timing: onset can vary, with first pubertal changes as early as 8 in girls, 9 or 10 in boys, and up to age 13 (developed countries) Length: time from onset of puberty to maturity can vary from 1. 5 to 6 years. Order: order of events more consistent than onset and length of time of puberty. This does not vary between person to person. Menarche: onset of menstruation irregular no ovulation. Research shows not hormones, its bc teenagers are involved in activities and each activities make them feel different, ie. go to school, mood down, hang out with friends, moods up etc.
