occurance of ovulation in female humans

Per Staurup staurup at melbourne.DIALix.oz.au
Mon Jan 23 09:53:46 EST 1995

I'm in the process at the moment of written a mini-thesis on pheromones and
have come across the following pieces of info included in my report that might
grab your attetion (because it sure grabbed mine) source it from Per Staurup if
you need to in your biblio, a few of the prominant names of researchers are
mentioned, but not extensively:

-Estrus synchrony is common in mammals, particularly smaller rodents.
 -pregnancy blocking is a common feature, too, in rodents particularly mice and
rats.  Occurs when females, who have been exposed to a male for extended periods
 of time, are exposed to just the scent of a foreign male and they abort.  Direc
t contact is not necessary and subjection to foreign urine and excretment can re
sult in an abortion (Parkes & Bruce '62; Bruce '59; Dominic '71)

Estrous synchrony:(1)-1971 Illinois researcher Martha McClintock proposed that w
omen who roomed together in a university residence had menstrual periods that we
re more synchronous than randomly chosen females [could be attributed to various
r factors such as diet, lifestyle, stresses, routines, etc.].  This was followed
 up MJ Russell et al in California.  This study concentrated on underarm secreti
ons or a placebo being placed on the upper lip of volunteers.  Within three mont
hs the menstrual cycles were synchronous and the placebo'ed" volunteers showed n
o positive trend.
    - sweat as a source of steroids may be a prodominant source of pheromone
 (1)- A similar experiment used the underarm secretions of men applied again on
the upper lips of women which, although not fully conclusive or reliable, increa
sed the synchrony of menstrual periods in women.

(1) - tests on volunteers report that vaginal secretions are found least unpleas
ant during the stages nearer to ovulation

(1) - females have been found to be more sensitive to odors around the middle ph
ase of the menstrual cycle therefore indicating that smell is or was inter-depen
dent on the reproductive cycle.
    (1) - various hormones are known to affect nasal sensitivity

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