To learn how to record natural service at the mob (herd) level, check out our article on Joining for mobs.
🌟Joining End Dates & Calving Windows
⏱️ Real-Time Breeding Timeline - you can accurately reflect the actual breeding period by recording both the start and end date of joining.
📅 Automated Calving/Lambing Window Calculation - Once both dates are entered, AgriWebb automatically calculates your expected calving or lambing window based on species gestation length:
Cattle: 283 days
Sheep: 147 days
This gives you a reliable window to expect calves or lambs to hit the ground—no more guessing! Think of it like a real-life timeline, where you can track the entire breeding window from start to finish.
“We put the bulls in on May 1st and pulled them out on June 15th. We can expect calving to start around the 8th Feb."
✅ For additional visibility, add a note to the AgriWebb Calendar to indicate when calving or lambing is expected to begin and share with your family or staff.
📱 Mobile App: Record a Joining Period
You can record joining for a group of individual animals on the go.
Open the AgriWebb App and tap Livestock in the bottom menu.
Tap Create Bulk Record and select the appropriate species.
Choose Joining from the list of records.
Fill in:
Start Date
Sires and Dams involved
(Optional) End Date – this allows you to define the joining window and calculate expected calving/lambing.
Tap Save.
✅ Once saved, the record is visible in the individual animal's History and the Joining/Natural Service Report.
💻 Web App: Record a Joining Period
Go to Livestock > Individuals.
Click Add Records.
Select the species and choose Joining Record.
Enter the:
Start Date
Sires and Dams
(Optional) End Date
Click Save to confirm the record.
⚠️ Caution: Movement ≠ Joining Record
Unlike the mob management platform, adding or moving bulls into a paddock with cows does not automatically create a joining record.
📊 View and Track Joining Periods
🐮 Individual Animal History (Mobile & Web)
Displays both start and end dates of joining
Shows the expected calving/lambing window
Indicates whether the window is based on joining or refined by pregnancy scanning
📄 Natural Service Report (Web App Only)
The report can be found here and now includes:
Join Start Date
Join End Date
Start of Calving/Lambing Window
End of Calving/Lambing Window
Calving window is calculated based on species gestation (147 days for sheep, 283 for cattle).
⚠️ If only a start date is entered, the end of the calving window will remain open-ended.
🍼 Calving Window Refinement with Pregnancy Scanning
Once a joining record is in place, AgriWebb estimates a calving or lambing window based on the species' average gestation length (147 days for sheep, 283 for cattle).
But we know life isn't always textbook — so when you scan your animals, AgriWebb can refine that window to give you a more accurate prediction of when births will occur.
🔍 How Scan Results Improve Calving Predictions:
Depending on how you record the pregnancy scan, AgriWebb adjusts the due date automatically:
✅ Days Pregnant
Enter the number of days pregnant the animal is at the time of the scan.
AgriWebb calculates the exact due date using:
Scan Date + (Gestation - Days Pregnant)
Example: Scanned on Jan 1, animal is 100 days pregnant → Due April 12
✅ Weeks Pregnant
Enter the number of weeks pregnant.
AgriWebb gives you a 7-day window around the estimated due date.
Example: Scanned Jan 1, 20 weeks pregnant → Calving window: March 25–31
✅ Pregnancy Stage (Early, Mid, Late)
If you don’t have an exact age but know the stage:
Early = First third of the original calving window
Mid = Middle third
Late = Final third
Note: This method only works if a joining record is in place
📌 Important:
Scan data always takes priority: If both joining and scan info are entered, AgriWebb uses the more accurate scan results to display your expected calving date.
No Joining Record? No problem — Days or Weeks Pregnant entries still calculate a due date on their own. However, Early/Mid/Late cannot calculate a date without a joining window to reference.