A good heat detection system and staying focused on the job ensures cows truly on heat are submitted to AI as soon as possible after calving. Staying focused on heat detection for at least 2 cycles will get more AI calves. Every cow that you find truly on heat is worth $200. If you miss heats or submit cows not on heat you will have fewer AI calves and lose dollars.
Video - heat detection in dairy cows:
The importance of good heat detection to maximise cow fertility at artificial insemination is explained in this short video. It identifies the different signs shown by cows in heat and the best times and places to do heat detection.
Your heat detection system is working well if:
- Seasonal herds - 9 out of 10 cows are inseminated within the 1st three weeks of mating
- Year-round herds - 3 out of 4 cows are inseminated within 80 days after calving (if you are aiming for a 12-month calving interval)
Get a Fertility Focus Report to check submission rate and heat detection efficiency. For best results combine paddock checks with the use of aids to look for signs and indicators of heat.
Heat detection (PDF, 1.0MB) Section 3, Chapter 10, 'Acting on priorities', from The InCalf Book.
Cows in colour booklet (PDF, 4.3MB)
Guide to automated heat technologies (PDF,3.8MB) Assess the various automated heat detection technologies currently available in Australia.
Heat detection tool: Seasonal/Split calving herds (PDF, 1.1MB) Assesses heat detection and the risk of missed heats in reducing herd reproductive performance for seasonal/split calving herds.
Heat detection tool: Year round calving herds (PDF, 1.2MB) Assesses heat detection and the risk of missed heats in reducing herd reproductive performance for year round calving herds.