One more thing that my wife reminded me reading ( when we find out where
will let you know )  is that women in a long term relationship with a man
have less misscarriage than women who change partners .

To give a direction in which scientists could look for an explanation of all
those phenomenons I will say immune system recognition of foreign molecules
.
We can suppose an automatic rejection by an healthy immune system of
spermatozoids unless certain conditions are met , like having been presented
over and over to the same one ( giving a biological ground to procreative
monogamy) or others...
With that explananation it could become clear why agriculturists became
suddenlly more prolific . The bombardment of foreign molecules ( not
genitically recognised because not original foods)  of food origin might
have have screwed up (  don't laugh! i am not good enough with english to
play  with words here ) the immune system.
forcing it to become more tolerant and so when any spermatozoid comes along
it is accepted without thinking twice by the women body.
we had the leaking gut syndrom we might have also the leaking uterus
syndrom.
But you don't have to take me seriously May be i am victim of    a  leaking
brain  ( not able to select informations  in a scientifically correct manner
and make them acceptable to the scientific communauty)

jean-claude





>It is an observed  fact that there is a regulation of births and
populations
>in wild animals and also in Huntergatherers ( there is also a regulation by
>deaths) This phenomenon is yet to receive plausible explanations .
>The bonobos for exemple who play with sexe a lot still don't have more
>births than their environment can handle.
>Malinowski studying the trobriand islands have noted the inability of teen
>agers to get pregnant despite a very rich sexe life.
>One thing observed By Malinowski was that more partners the teen agers  had
>and less conceptions was happenning  , only the married women were getting
>pregnant .
>
>There is more to conception than the meeting of a spermatozoid and an ovule
>, hard to get for a scientist.
>Also the peoples eating instinctively undenatured food,  have observed a
>drop of endogenus stimulation of the nervous system due to denatured
>molecules circulating in the blood ,  openning to new sensitivities and
>lowering the need for discharging copulation .
>
>way more to learn on that subject
>By the way i am expecting a baby at the end of the month.
>I don't do sexe often but when i do with the intent of procreating it just
>works.
>jean-claude