Fig. 1From: Observation of dose dependent intravaginal Prostaglandin E2 application in free farrowing sows during parturition – a pilot studyInterval between each piglet expulsion before (bt) and after treatment (at) in the four different treatment groups. The different light bars represent values for individual sows (S1 = sow 1; S2 = sow 2; S3 = Sow3) and the dark bars represent mean values (M) for each groupBack to article page