Enter the mating date to work out when your cow is due. Cows are pregnant for about 283 days.
Cows are pregnant for about 283 days, and most give birth between day 279 and day 290 after mating. Enter the mating date for a due date and a timeline.
Use the date of service or artificial insemination.
| Typical length | 283 days from mating |
|---|---|
| Usual range | Day 279 to day 290 |
| Day 30 | Your vet can confirm pregnancy by ultrasound from around now. |
| Day 223 | Dairy cows are usually dried off about 60 days before calving. |
| Day 269 | Move her to a clean calving area about two weeks before she is due. |
How to use it
Choose the animal and enter the date she was mated. The calculator adds the typical length of pregnancy for that species to give a due date, and shows the window in which most births happen. It also lists the checks and preparations worth planning, with their dates.
Pregnancy length varies between individuals, breeds and litter sizes, and counting from mating rather than ovulation adds a few days either way. Treat the due date as a guide and keep watching her closely as the window approaches.
Call your vet if she goes past the end of the normal window, strains for a long time without producing young, seems weak or distressed, has a green or bloody discharge before any young arrive, or if a long gap passes between births.
About 283 days, around 9 months, from mating. Most cows give birth between day 279 and day 290.
From about day 30 after mating. Your vet can confirm pregnancy by ultrasound from around now.
If she goes past day 290 without giving birth, or shows signs of distress, straining without result or an unusual discharge at any point, contact your vet.
Use the first mating for dogs and cats, as eggs can be fertilised over several days. Use the last covering for mares. For livestock, use the service date, or the raddle mark for sheep.
It is a guide. Most births fall within the window shown, and ultrasound scans can narrow it down. Large litters often arrive a little early and single young a little late.
These tools are planning aids, not a diagnosis or a replacement for veterinary advice. If a pet is unwell, has eaten something risky, or you are unsure what to do next, contact a vet.