pferde spiegel 2010; 13(1): 2-10
DOI: 10.1055/s-0029-1240935

© Enke Verlag in MVS Medizinverlage Stuttgart GmbH & Co. KG

Die Trächtigkeitsuntersuchung bei der Stute

Pregnancy diagnosis in the mareChristine Aurich
Further Information

Publication History

Publication Date:
16 March 2010 (online)


Today, pregnancy diagnosis in the mare is performed by transrectal ultrasonography on days 17 or 18 after ovulation. If the mare is found not to be pregnant, she can be bred in the subsequent oestrus again. When performing a pregnancy diagnosis, the veterinarian has to check for the presence of twins. In mares with double ovulation, pregnancy diagnosis by transrectal ultrasound should be scheduled for day 14 or 15 after ovulation as manual reduction of twins to a singleton is facilitated before fixation of the conceptus. A second ultrasound examination should be performed between days 30 to 35 to allow an early diagnosis of embryonic death. From day 90 of pregnancy onwards transabdominal ultrasound examination can be performed. Besides ultrasound, pregnancy in the mare can be diagnosed by determination of pregnancy-associated hormones such as equine chorionic gonadotrophin, placental progestins or conjugated oestrogens. However, the determination of these hormones does not allow differentiation between singleton and twin pregnancies and, in the mare, is considered a supplemental diagnostic tool, only.


Prof. Dr. Christine Aurich

Besamungs- und Embryotransferstation
Veterinärmedizinische Universität Wien

Veterinärplatz 1

1210 Wien


Graf Lehndorff Institut für Pferdewissenschaften
Brandenburgisches Haupt- und Landgestüt

Hauptgestüt 10

16845 Neustadt (Dosse)