How to use this chart
Find the month the ewe was bred in, then her breeding date in the left column. The date beside it is the expected lambing date at 147 days. For a group bred on pasture, look up both the day the male went in and the day he came out: the lambing window runs between those two dates.
The chart is a fixed 147-day count. If you want the date adjusted for your breed, plus the checks worth doing along the way, use the Sheep Gestation Calculator, which also sends the dates to your phone's calendar.
Frequently asked questions
How do I use an ewe gestation table?
Find the day the ram went in, then read across for the expected lambing date at 147 days. For a flock, check the ram-out date too and expect lambing across that whole span.
Is sheep gestation always 147 days?
It averages 147, with a normal range of about 142 to 152 days. Down breeds such as Suffolk and Dorset often lamb a little earlier.
How long should the ram be with the ewes?
Two cycles, about 34 days, gives every ewe two chances. Your lambing period then runs about five weeks.
Can I print this lambing chart?
Yes, print the page and only the chart prints. Many shepherds pin it inside the lambing shed.
Estimates only. Individual animals vary — confirm pregnancy and health questions with your veterinarian. Last reviewed 2026-10-05.