... including synchronising their breeding behaviour. It is usefull for a farmer to know when his lambs will be born, and also to have them born within a short period of time. The farmer could just let nature take its course and allow the sheep to come into their oestrous cycle and therefore get impregnated naturally, but many use various hormones to help synchronise the impregnation and therefore birth of the sheep. A farmer would do this by first introducing a teaser ram which has had vasectomy into a flock of ewes, this would bring them into season, 2 weeks after the introduction of the teaser ram the farmer would take measures to synchronise the oestrogen cycle of his ewes, he would do this by removing the teaser ram, followed by inserting a sponge, impregnated with the hormone progesterone, into the vagina of the ewe, which will inhibit the FSH preventing ...

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