Thus changes in sexual interest and arousability might not always be reflected

Thus changes in sexual interest and arousability

This preview shows page 32 - 36 out of 40 pages.

Thus, changes in sexual interest and arousability might not always be reflected in changes in sexual behavior, but could be for other reasons such as affection or willingness for partner.
Image of page 32
9/9/16 33 Matteoand Rissman, 1984: lesbian couples (whose menstrual cycles and fluctuations in ovarian hormones are likely to be synchronized) Significant increase in sexual interest and activity during the middle portions of the women’s cycles. Activational Effects of Sex Hormones in Women Activational Effects of Sex Hormones in Women Van Goozen et al., (1997): sexual activity initiated by men and women in heterosexual relationships = different relationships to the woman’s menstrual cycle (and hence to her level of ovarian hormones). Men initiated sexual activity at about the same ratethroughout the woman’s cycle, whereas sexual activity initiated by women showed a distinct peak around the time of ovulation, when estradiol levels are highest.
Image of page 33
9/9/16 34 Studies with primates show sex hormones also influence partner preference. Duringtheir infertile periods,female chimpanzees initiate sexual activity with many males in their group. Duringfertility, they become selective and tend to mate with the same few males—presumably, those that showed the most promise of being able to supply good genes for their offspring. Other factors can contribute to human sexual behavior and override hormonal influences. For example, if a woman does not want to become pregnant and does not have confidence in birth control, she may avoid sexual intercourseat midcycle, around the time of ovulation—even if her potential sexual interest is at a peak. Women wanting to conceive – opposite behavior Activational Effects of Sex Hormones in Women Women’ssexual interestcan be stimulated by androgens. Ovariesand theadrenal glands. The primary ovariansex steroidsareestradiol and progesterone,buttheseglandsalso produce testosterone. The adrenal glandsproduceanother androgen, androstenedione ,alongwith other adrenocortical steroids. Androgensby themselves(in theabsenceof estradiol) do notdirectly stimulatewomen’ssexual interestbutappear to amplify the effects of estradiol. Activational Effects of Sex Hormones in Women ages/S/SexHormones.html
Image of page 34
9/9/16 35 Without testosterone, sperm production and sexual interest ceases. Bagatellet al., (1994) placebo or a gonadotropin-releasing hormone (GnRH) antagonist to young male volunteers to suppress secretion of testicular androgens. Within two weeks, GnRH antagonist cohort = decrease in sexual interest, sexual fantasy, and intercourse. Men who received replacement doses of testosterone along with the antagonist did not show these changes. Activational Effects of Sex Hormones in Men Wallen (1991,2000):GnRHantagonist in adult male rhesus monkeys. The injection suppressed testosterone secretion, and sexual behavior declined after one week. Decline was related to social rank. More sexually experienced, high- rankingmales continued to copulate.
Image of page 35
Image of page 36

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture