The gestation period usually refers to the time of a fetal development, starting from fertilization and ending at birth. The duration of this period varies from species to species.
| animals | Gestation period (days) | Earliest and best time for ultrasound | ||
| Min | Max | Average | ||
| Pig | 102 | 140 | 114 | The earliest examination can be done 18 days after mating, the best after 25 days |
| Horse | 300 | 412 | 340 | The earliest examination can be done 45 days after mating, the best after 50 days |
| Cow | 276 | 290 | 282 | The earliest examination can be done 28 days after mating, the best after 32 days |
| Sheep | 146 | 161 | 152 | The earliest examination can be done 32 days after mating, the best after 40 days |
| Donkey | 340 | 380 | 360 | The earliest examination can be done 50 days after mating, the best after 60 days |
| Dog | 58 | 65 | 60 | The earliest examination can be done 15 days after mating, the best after 20 days |
| Cat | 55 | 60 | 58 | The earliest examination can be done 15 days after mating, the best after 20 days |
The gestation figures given here are in days. They represent average values and should be considered as approximations only.
Post time: Feb-13-2023