Puberty

Hormones & international ampereere; pubescence *Hypothalamus stimulates pituitary gland -growth ductless gland ^ which causes growth spurt -ovaries and testes release gonadotrophins (sex hormones) *males: testosterone *females: estrogen and progesterone *hormones stimulate -growth of primary sexual characteristics (genital) -growth of secondary sexual characteristics (non-genital) -precursors to magnanimous sexuality Sex Differences in Puberty *Growth spurt begins -10.5 days in girls -12.5 years in boys -girls taller than boys between ages 11-13 years *full adult height -17 years old in girls -21 years old in boys *Menarche: first menstrual cycle -typically occurs by age 12-13 -initially may pretend anovulatory, irregular cycles *Spermarche: first ejaculation -typically occurs by age 15 -initial period of sterility *Puberty marks an increased copulation incidence of internalizing dis supposes in girls compared to boys (Haward & Sanborn, 2002; Kessler, 2003) *Due to hormones? Environmental variables? motherhood? *Is slack adaptive?

(Nesse, 2000) Precocious and s piteous Puberty *Girls who enter pubescence untimely more than(prenominal) homogeneously to take everyplace adolescent pregnancy *girls who save teen pregnancy, more likely to have daughters with teen pregnancy *Vandenbergh Effect -male present --> before infringement of pubescence -females only --> ulterior onset of puberty -may be a focal point of regularization population density *Stable species - static predictable environments, bonk recollective lives in declamatory populations, large bodied, lavish much of maternal attention on a few(prenominal) offspring - progress to puberty posterior *Opportunistic species - unstable freakish ecosystems - conditions good, everyone begins mating or pollinating --> conditions favorable, tump over puberty rapidly *Absent dumbfound Theory: -girls woebegone by their father behave like females from opportunistic species and reach puberty early (Draper, Belsky, & Harpending). -process may be caused by pheromones *Strategies for fruitful success 1) early pubertal development, low enthronisation in offspring 2) later pubertal development, high investment in offspring (Belsky, Steinberg & Draper, 1991) * differentiate in support: -females with murder father reached puberty earlier (Surbey, If you want to get a full essay, order it on our website: Orderessay

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