The phrase identifies a tool, either physical or digital, designed to estimate the expected birthing date for ewes. These instruments utilize the average duration of pregnancy in sheep, which typically ranges from 142 to 152 days, to project the lambing date based on the date of conception or breeding. As an example, if a ewe is bred on January 1st, such a device would calculate a projected lambing date sometime between late May and early June, dependent upon the specific average duration used by the estimator.
Accurate prediction of parturition is critical for effective flock management. Knowing the approximate date of lambing enables farmers to allocate resources efficiently, including labor for assisting with births, providing appropriate nutrition to pregnant ewes, and preparing lambing pens. Furthermore, it facilitates the synchronization of management practices, improving overall productivity and reducing potential losses associated with complications during lambing. Historically, farmers relied on manual record-keeping and personal experience; such calculators enhance precision.
