Human-Sexuality-1.docx

Magnus hirschfield o attempted to counter legal and

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- Magnus Hirschfield: o Attempted to counter legal and social homophobia by advocating through science. o Transvestite discovery. o Exiled during Nazi regime. - Alfred Kinsey o Applied statistics to sex research instead of personal observation o Kinsey Institute at Indiana University o “Sexual Behaviour in the Human Male” 1848 “Sexual Behaviour in the Human Female” -1953 o Fostered new level of awareness about diversity of behavior video. o X-factor (also known now as asexual) - Masters and Johnson
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o Their pioneer work helped us understand for the first time what happens in the female and male body during sexual intercourse o Orgasm. - Shere Hite (1942) o Known for the Hite Report which focused on female sexuality. o 70% of women did not reach orgasm during sex Chapter 4 - Sexual Anatomy From an evolutionary standpoint, sex is ultimately about reproduction. Females are born with essentially all of these early versions of eggs in all of the primordial follicles they will ever have. (around 1 million at birth) - Right around birth the oocytes stop developing and they get stuck in meiosis and they stay that way for years. - The process of egg creation or oogenesis is delayed until puberty until the rest of the body is able to reproduce. - Human eggs develop one by one. Every month or so a mature egg will be fertilized or will die to make way for a new egg. (menstrual cycle) - The menstrual cycle happens in the uterus to prepare for a fertilized egg. The ovarian cycle is the maturation of the follicle and egg. - Every day a bunch of follicles will begin a process of maturation from primordial follicles to what is known as late tertiary follicles which will support a fully developed egg. (this process takes 375 days) - Out of the follicles only one will end up supporting a single mature egg. - For eggs that start maturing before puberty they go through a programmed self- destruction called atresia . - All of this activity is regulated by sex hormones. Around puberty the hypothalamus and pituitary gland set up two concurrent cycles. The ovarian cycle and the menstrual cycle. - When puberty begins the hypothalamus starts up the ovarian cycle by releasing GnRH (sex hormone that stimulates the anterior pituitary to release two more hormones). These hormones are the FSH and LH. - The FSH stimulates the growth of a singular follicle (furthest along in development at the time). - The FSH stimulates the follicle to keep growing which causes the follicle to start making and releasing its own estrogen hormones. Which causes the follicle to grow more and also stimulates the pituitary to release another pulse of LH. - The LH works on the oocyte inside the follicle that has been dormant and stimulates it to start dividing again. Which causes it to move from meiosis I to metaphase II. - This process takes about 14 days in which the follicle is now mature, pushes up against the follicle wall, ruptures and with the help of enzymes breaches the wall and ejects a single mal-mature oocyte. (ovulated)
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- The follicle now slows its estrogen production and morphs into a different structure called the corpus luteum
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