infredian rhythms Flashcards
(6 cards)
what is it
a biological rhythm that’s longer than 24 hours to complete one cycle- menstrual cycle (28 days)
menstrual cycle
28 days
6 days of fertility
cycles can be short or longer ranging between 24-35
release of egg, womb thickening lining, losing womb lining in menstruation, regulated by oestrogen and progesterone
endogenous
level of hormones that keep bio processes to time
ex
pheromones of other women as they can sync
positive
stern- 20 women given cotton pads from other women’s armpits and rubbed on upper lips daily
their periods sync - ez
mcclintock- 135 women lived in same dorm sync their cycles with friend groups
negative
p variables in any- diet and stress no way to fully control variables
trevathan et al- no evidence in sync large sample of women living together