A chimpanzee mother carries her baby and gives it milk for about four years before she comes into oestrus again and bears another. |
As long as a cow or heifer is not pregnant she will normally have a 21-day oestrus cycle. |
The tissue concentrations of anandamide and 2-AG were reduced in the oestrus phase, compared to dioestrus. |
It is concluded that the endocannabinoid system undergoes to adaptive changes between the oestrus and dioestrus phases. |
Should consider managing cycle to ensure mare has ovulated and finished oestrus before start of competition. |
This rule dictates that cows and heifers first observed in oestrus in the afternoon or the following morning, should be bred later that day. |