Dairy Australia - Dairy information for Australian Dairy Farmers and the industry

Primary content

The tools and publications to help you measure and manage your herd calving pattern.

Managing calving pattern

Calving pattern has a major impact on herd reproductive performance. Cows that calve in the first three weeks of the calving period typically have 6-week in-calf rates around 70% compared with 20% for very late calved cows (calved after week 9 of calving). Not-in-calf rates are also affected.

For seasonal and split calving herds

Use the Calving Pattern Tool (PDF, 135KB) to measure the pattern of calvings within a calving group and identify the gap between the actual and desired calving pattern. It also provides an assessment of the $ benefits of closing this gap through improved herd reproductive performance. Closing this gap can also improve milk income and feed costs.

Use the Length of Mating Period Tool (PDF, 934KB) to assess the impact of extending or reducing the mating period.

For year round calving herds

The Voluntary Waiting Period (PDF, 1MB) tool will help you measure of your herd'¬ôs actual Voluntary Waiting Period (VWP) and assesses the financial benefits of improved herd reproductive performance from achieving a shorter VWP.

Many different oestrus synchrony methods are in common use in lactating cows. The Guide to synchrony programs for dairy herds (PDF, 2MB) outlines the pros and cons of the different synchrony programs in terms of costs, resources required, complexity of management and outcomes.

More information

Major Initiatives

Focus Farms

Dairy Australia has established a network of Focus Farms to support farmer decision making. Find out how Focus Farms looks at the factors impacting decisions at any point in time, including seasonal and market conditions.


DataGene is an independent and industry-owned organisation responsible for driving genetic gain and herd improvement in the Australian dairy industry and is an initiative of Dairy Australia and industry.

More Initiatives