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    Re: [RC] Masculine Mare - Heidi Smith


    > I have a (QH) mare like that.....besides being the Alpha Boss Mare.......I
    > have never seen her in season......she can bring other mares "in" .....I
    > swear she "teases" them.....with the crested neck, the sniffing, the
    > snorting....she controls the herd, even my strong willed arab
    > geldings......But WOW she is a great trail horse.....courageous,
    confident,
    > curious.....always willing to go.....I would love to breed her, but have
    > always assumed that since I couldn't identify a cycle.......breeding would
    > most likely be difficult.
    
    Just an aside here--the hormone progesterone (up during pregnancy, and also
    produced by the corpus luteum between heats) is very closely related to
    testosterone (and in fact, goes through being testosterone at one point in
    its production).  It is not uncommon for pregnant mares to exhibit very
    stallion-like behavior.  When non-pregnant mares do this, it is also worth
    checking to see if they have a granulosa cell ovarian tumor that is
    producing progesterone.  Mares that do have granulosa cell tumors often
    revert to normal cyclic behavior once the offending ovary is surgically
    removed.  I'd suspect that most of the mares that are naturally masculine
    have increased progesterone, rather than testosterone, as well....
    
    Heidi
    
    
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    Replies
    RE: [RC] Masculine Mare, Snodgrass, Bonnie
    Re: [RC] Masculine Mare, Heidi Smith
    Re: [RC] Masculine Mare, Jeannie Gillen