the heat period, which usually lasts two or three days, is the time during which the sow will accept the boar. It is better to breed the sow during the second or third day of the heat period than during the first day.
In addition to the above principles, the following rules shall apply:
(a) the use of substances to promote growth or production, (including antibiotics, coccidiostatics and other artificial aids for growth promotion purposes) and the use of hormones or similar substances to control reproduction (e.g. induction or synchronisation of oestrus), or for other purposes, is prohibited. Nevertheless, hormones may be administered to an individual animal, as a form of therapeutic veterinary treatment ...
Hea teada
Although 'heat period', 'heat', and 'season' are essentially synonymous, they cannot be used interchangeably in all contexts, and care must be taken when they are used. 'Heat period' is required in such expressions as 'return of', 'late return of', 'regularity of'.
