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=== Preparations which Stimulate Release of Anterior Pituitary Hormones ===
 
=== Preparations which Stimulate Release of Anterior Pituitary Hormones ===
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* Purified LH and FSH can be extracted from the pituitary gland in the abbatoir, but this is too time consuming to be practiced commercially.  There is also the risk of transmitting diseases such as BSE.
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* Instead, two substitutes are used commercially:
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** Equine Chorionic Gonadotrophin (eCG): obtained from the serum of pregnant mares.  This has an 'FSH-like' effect, but with some 'LH-like' activity.
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** Human Chorionic Gonadotrophin (hCG): obtained from the urine of pregnant women.  It has mainly an 'LH-like' effect, but with some 'FSH-like' activity.
    
=== Preparations which Supplement or Replace Pituitary Gonadotrophins ===
 
=== Preparations which Supplement or Replace Pituitary Gonadotrophins ===
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