Sleep - Infradian Rhythms

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Menstural Cycle
Menstrual cycle regulates ovulation. Pituitary gland releases hormones (FHS+LH). Egg ripens and triggers oestrogen and progesterone production. If not pregnant, progesterone levels fall and the lining is shed
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McClintock
10 year study, involving 29 women, with a history of irregular, spontaneous ovulation. Pads with pheromones on wiped under the noses of 20 women daily. Found that 68% of women responded to the peromones.
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Russell et al (Supports McClintock)
Also placed dabs of sweat taken from arm pits of sexually active women and placed on the upper lips of other women. Four out of five of the women had menstrual cycles that synchronised to within one day of the sweat-donar
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:) Evolutionary Advantages of external control of menstrual cycle
Bentley - Synchronisation for women living close to each other would lead to conception and birth at similar times - Benefits - Share breast feeding and child care
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:) Evolutionary Advantages of external control of menstrual cycle
McClintock - Women who work in a mostly male environment have shorter menstrual cycles - More opportunity for pregnancies
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Other cards in this set

Card 2

Front

10 year study, involving 29 women, with a history of irregular, spontaneous ovulation. Pads with pheromones on wiped under the noses of 20 women daily. Found that 68% of women responded to the peromones.

Back

McClintock

Card 3

Front

Also placed dabs of sweat taken from arm pits of sexually active women and placed on the upper lips of other women. Four out of five of the women had menstrual cycles that synchronised to within one day of the sweat-donar

Back

Preview of the back of card 3

Card 4

Front

Bentley - Synchronisation for women living close to each other would lead to conception and birth at similar times - Benefits - Share breast feeding and child care

Back

Preview of the back of card 4

Card 5

Front

McClintock - Women who work in a mostly male environment have shorter menstrual cycles - More opportunity for pregnancies

Back

Preview of the back of card 5

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