Enter the mating date to work out when your ewe is due. Sheep are pregnant for about 147 days.
Sheep are pregnant for about 147 days, and most give birth between day 142 and day 152 after mating. Enter the mating date for a due date and a timeline.
Use the date she was tupped. A raddle or harness shows when the ram has mated each ewe.
| Typical length | 147 days from mating |
|---|---|
| Usual range | Day 142 to day 152 |
| Day 45 | Scanning from around now, and before about day 90, shows whether she is in lamb and how many lambs she carries. |
| Day 105 | The last six weeks: most lamb growth happens now, so feed to body condition and scanning results. |
| Day 112 | Ask your vet about a clostridial booster, usually given four to six weeks before lambing. |
| Day 140 | Have lambing pens, colostrum and your lambing kit ready. |
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 147 days, around 5 months, from mating. Most sheep give birth between day 142 and day 152.
If she goes past day 152 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.