Pregnancy testing sows at day 21 to 28 is a very economical procedure in modern pork production. Sows are relatively easy to ultrasound when restrained in a crate. With more production switching to loose housing for sows, pregnancy testing is more of a challenge.
Pregnancy testing sows can be done very effectively with the ReproScan XTC, BoviScan Curve and the ReproScan Flexx using the 4.0 MHz convex rectal probe. Use a deep setting so the sow’s uterus is easy to see. Most people prefer the Vista Goggles for this job.