Summary The medical records of pregnant mares over a 3‐year period were reviewed. In all cases persistent pain or progressive abdominal distension were the main reason for referral. The overall survival rate for the 115 mares treated for colic was 73.9% (85 cases). The abortion rate was 20.5% in surgical patients (34 cases), 40% (5 cases) for mares with uterine torsions and 10.8% (46 cases) after medical treatment. The total abortion rate was 16.4%. Clinical evidence of endotoxaemia was, except for 1 mare, present in all the aborting mares after colic treatment. Anaesthesia did not appear to be a problem because abortion occurred in 5/46 medically treated cases as well as in 9/39 mares treated surgically. Abortion occurred in 3 mares that suffered intraoperative hypoxia, but fasting for >30 h did not seem to cause prolonged hypoglycaemia and subsequent abortion. Clenbuterol hydrochloride was used as a tocolytic agent in 9 mares with uterine displacement, abortus imminens and post‐operative uterine torsion and 3 mares aborted during treatment.

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Zusammenfassung Es sind uns eine Reihe von Sturen bekannt, bei denen es zu Verklebungen im Scheidenbereich, sei es nach Geburtsoder Paarungsverletzungen oder nach örrlicher Behandlung mit ätzenden Mitteln, gekommen ist. In allen Fdllen v/aren die Versuche zur manuellen Aufdehnung der Verklebungen unrer Spreizen der Finger erfolgreich, wenn auch nur bei wenigen Tieren die Fruchtbarkeit wiederhergestellt werden konnte. Im hier beschriebenen Fall führte das manuelle Aufdehnen der Verklebungen zur Perforation des Scheidendaches und damit zur Öffnung der Bauchhahle. Caution when opening vaginal adhesions in mares Adhesions in the vaginal areas of mares sometimes occur following parturition, mating, or even rreatmenrs with caustic medications. In all cxes which we have seen, it has been possible ro open the adhesions by introducing the hand and spreading the fingers, although the fertility could only be reestablished in a few cases. In rhe case described here the spread fingers opened the abdominal cavity with little effon.