EN
The aim of the study was to compare the efficacy of a variety of methods of early pregnancy detection in bitches. 32 bitches were examined by Draminski Ultrasonic Pregnancy Detector (Dramiñski®, probe 2.5 MHz), ultrasonography (Echoson®, probe: 3.5 MHz, 5 MHz, 7.5 MHZ) and by the Witness Relaxin Test (Synbiotics®) which measures relaxin levels in plasma or serum samples. Blood samples from the bitches were collected with the anticoagulant. The first examination took place between 23 and 25 day post-mating. The second, control examination, took place 30 days post-mating. The results of the examinations were compared with personal information obtained from the breeder relating to whether or not parturition had occurred. The results confirmed that ultrasonograph is the best method for early pregnancy detection in bitches. The Draminski Pregnancy Detector (locating amniotic fluid in the uterus) was also found to be very useful. Witness Relaxin Test should not to be used for early pregnancy detection in bitches, because its lack of efficacy at this time.