Optimise reproduction

Improving your 6-week in-calf rate and reducing not-in-calf and empty rates is good for your farm’s bottom line, and the environment.

Measure to monitor

Knowing your numbers will help identify areas for improvement. Keep animal records up to date and entered into herd management systems.

Review your fertility focus report annually.

Manage cow body condition

Focus on nutrition to ensure cows hit the right BCS targets at different times of the season. Achieving a pre-calving body conditioning score (BCS) of 5.0 for cows, and 5.5 for first and second calvers, sets them up to achieve 4 or above going into mating. Throughout the season, if a cow's BCS falls below 4, consider changing the milking frequency or feed for the animal.

Consistent feed quality

Avoid any sudden changes in diet, and ensure consistent feed supply and feed quality to meet the energy demand of the cow.  Have a clear plan of pasture and crop management that support cows through transition nutrition pre-calving.

What you can do

Think about animal health throughout the season. Your vet can provide advice, or read our article on the five strategies to consider when managing BCS. 

Colostrum management is key

Healthy calves turn into productive cows; and healthy, productive cows produce more milk relative to emissions. Capitalise on early growth efficiency.

Weigh your heifers every eight weeks

Heavier, healthier heifers produce more milk in their first lactation and future seasons. Help heifers to meet liveweight targets by age stage, and ensure they have enough feed, protein, and trace elements to support good growth.

Consistent feed quality

Ensure pasture quality is consistent to ensure consistent heifer growth rates. Avoid any sudden changes in diet and choose the right supplements and crops to support optimal growth.

Animal health plans

Youngstock are more susceptible to disease, and this can impact growth rates. Put prevention plans in place to protect against  parasites, and diseases like coccidiosis and facial eczema.

What you can do

Put a heifer development plan in place, if you don’t have one already. This is to help your heifers meet the right growth rates over the first two years of their lives. 

Establish protocols early, and communicate these

Use whichever heat detection aids work best for your farm – tail paint, technology, recording. Make sure your team is refreshed on how you're using these with clear, consistent communication throughout mating.

What you can do

Review your current heat detection strategy – DairyNZ have collected a list of options, with best practice advice. 

Identify issues early

Get bloods taken to assess herd health and identify any nutritional or mineral issues. Bloods taken in the pre-mating period and calving period can help to spot these issues. 

Know your cycles

Record when your cows are cycling – cross-check this information with the cows that come in the first cycle of mating. Then you can focus on the cows that haven't started, or might have stopped cycling, as soon as possible.

Aim to have all cows back in-calf within 12 months of calving. Your cows will have more opportunity to cycle well before the planned start of mating and are more likely to get in calf.

What you can do

Work with key advisors, like your vet, to ensure cows are cycling early with the best chance of getting in-calf and to review any opportunities to improve mating.

Breeding worth

Use breeding worth to select the best cows and bulls to be the parents of the next generation and consider genetic traits like calving ease and fertility.

What you can do

Read more about the traits of highly efficient cows, and how to identify them in your herd. 

Looking for other ways to
optimise on-farm efficiency?

Get in touch

Have a question? We’re here to help


Talk with your vet or herd improvement company to make a plan for your farm on the best approach to reproduction.

Or call our Farmer Support Team on 0800 65 65 68 for more options.