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. 2019 Nov 11;9(11):950. doi: 10.3390/ani9110950

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Transabdominal ultrasonographic images of uterine cross-sections (×) of sows assessed at (A) day of weaning (e.g., 28 days lactation) and (C) after a 14 days progesterone treatment initiated at weaning to postpone estrus. The uteri are filled with more (C) or less (A) flocculent fluid of moderate (C) or extreme volume (A). Uterine vessels are prominently enlarged (examples marked with arrows). (B) Moderate liquid purulent vulval discharge on the floor behind the sow passively drained off the sow (corresponds to image A). (D) Minor amounts of creamy purulent discharge in between vulval labia (corresponds to image C). (A,C) Scale bars on right margins in 0.5 cm steps.