Merck Manual

Please confirm that you are a health care professional

Common Tests for Detection of Pregnancy In Pigs

Common Tests for Detection of Pregnancy In Pigs

Technique

Test Type

Application of Test After Breeding (Accuracy)

Estrus detection

Indirect

Daily testing 18–25 days (75%–85%) and through gestation (98%)

External physical signs

Indirect

>55 days (gilts); >84 days (sows)

Rectal palpation (sows)

Indirect

30 days (94%), >60 days (100%)

Ultrasonography

A-mode

Doppler

Real-time (B-mode)

Indirect

Direct/Indirect

Direct

30–75 days (95%)

≥35 days (>85%)

≥22 days (>95%)