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.Agenesis It is a failure of living bodies to
reproduction, and it occurs in both females and males. The causes of
agenesis are probably chromosome and genic anomalies which are very
difficult to diagnosticate and at times even impossible to treat.
And it is no use getting the offspring from such individuals. The
main cause of agenesis in females is hysteritis or genital tracts.
Growths and different anatomic defects of reproductive system also
prevent occurrence of pregnancy. A serious problem is a very long
retention of estruses or a total absence of them. If female does not
have estrus for 1.5 year, she should be examined by a veterinarian.
Prolonged estruses are dangerous too, i.e. very often are connected
with oothecomae. In this case excessive production of estrogens
takes place with the result that estrus lasts for weeks and months....to
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