Donkey pregnancy guide
How long is a donkey pregnant?
A donkey is pregnant for about 365 days (about 12 months). The normal range is 335 to 395 days, so most foal arrive within that window rather than on the exact average day. Breed shifts the date by a few days, which is why the calculator asks for it.
Quick rule: Count about 12 months forward from the last breeding date, then adjust for breed.
How to use the donkey pregnancy calculator
1. Enter the last breeding date. The last date she was covered by the jack. Tap Use today if it was today.
2. Pick the breed. The whole window moves with the breed average.
Then follow the schedule. Each task gets a real date, the next one is highlighted, the status shows whether your jenny is on track, and the month by month cards above show where things stand. Use Copy schedule or Add to Google Calendar to keep it.
Gestation formulas
- Estimated foaling date = last breeding date + 365 days
- Earliest normal foaling = last breeding date + 335 days
- Latest normal foaling = last breeding date + 395 days
- Breed adjustment = breed average minus 365 days, applied to the whole window
- Call your vet if nothing has happened by day 400
Care schedule for a pregnant jenny
| When | Task | Why |
|---|---|---|
| Day 16 | Ultrasound check | Scan between days 14 to 18 to confirm and check for twins. |
| Day 45 | Recheck pregnancy | Confirms she is still in foal. |
| 35 days before due date | Vaccine boosters | Pre-foaling boosters as advised by your vet. |
| 30 days before due date | Move to foaling area | Clean, sheltered area away from other animals. |
| 14 days before due date | Watch for udder changes | The udder fills in the final weeks. |
Signs of foaling and when to call the vet
Labour is close if she has
- ✓Udder fills, often only in the last days
- ✓Wax or milk on the teats
- ✓Restless, separating from companions
- ✓Sweating and lying down again and again
Call your vet immediately if
- !Strong straining for 30 minutes with no foal born
- !A baby is visible but stuck, or comes backwards with no progress
- !Heavy bleeding or foul-smelling discharge
- !She is weak, collapsed, off her food or in obvious pain
- !No foaling by day 400
Donkey gestation by breed
| Breed or type | Average | Normal window from the start date |
|---|---|---|
| Standard donkey | 365 days | 335 to 395 days |
| Miniature donkey | 360 days | 330 to 390 days |
| Mammoth donkey | 370 days | 340 to 400 days |
Frequently asked questions
How long is a donkey pregnant?
A donkey is pregnant for about 365 days (about 12 months). Most foal arrive between day 335 and day 395. Breed matters: Standard donkey about 365 days, Miniature donkey about 360 days, Mammoth donkey about 370 days.
How accurate is this calculator?
It uses the average length and the normal range published in veterinary references, adjusted for the breed you pick. Individual animals vary, so treat the date as the middle of a window, not a promise.
When can I confirm the pregnancy?
Ultrasound check around day 16. Scan between days 14 to 18 to confirm and check for twins.
What if she goes past the due date?
Going a few days past the average is normal. The calculator marks day 395 as the end of the usual window and day 400 as the point to call your vet even if she seems well.
What are the signs that foaling is close?
Udder fills, often only in the last days. Wax or milk on the teats. Restless, separating from companions.
Is my data saved?
No. Everything is calculated in your browser. Nothing you type is stored or sent anywhere.
Disclaimer: This calculator gives estimates for planning only. It is not veterinary advice and cannot replace an examination by your vet. If you are worried at any stage, especially around birth, contact your vet promptly.
