{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,26]],"date-time":"2026-09-26T01:47:55Z","timestamp":1790387275154,"version":"4.1.0"},"reference-count":35,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2020,9,4]],"date-time":"2020-09-04T00:00:00Z","timestamp":1599177600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Animals"],"abstract":"<jats:p>Equine fetomaternal monitoring is based on endocrine and cardiac parameters which may differ among small, medium-size, and full-size horses. Therefore, Shetland (n = 6), Haflinger (n = 8), and Warmblood pregnancies (n = 9) were studied during late gestation and at foaling. Weight of mares, foals and placenta, plasma progestin and cortisol concentration, heart rate and heart rate variability (HRV) were determined. Foal weight always approximated 10% of mare weight but relative placenta weight was highest in full-size mares (p &lt; 0.05). Progestin (p &lt; 0.001) and cortisol (p &lt; 0.05) concentration was highest in full-size mares. Progestin concentration decreased towards parturition (p &lt; 0.001) while cortisol concentration increased (p &lt; 0.01). Maternal heart rate increased before foaling with the most pronounced increase in small mares (p &lt; 0.001). The HRV increased during foaling and decreased when delivery was completed (p &lt; 0.001). Changes were most pronounced in full-size mares (p &lt; 0.001). Atrio-ventricular blocks regularly occurred in parturient full-size mares but only occasionally in medium-size and small mares (time p &lt; 0.05, time \u00d7 group p &lt; 0.05). This may reflect breed differences in cardiovascular efficiency. Fetal heart rate decreased towards birth (p &lt; 0.001) with the most pronounced decrease in full-size horses (p &lt; 0.01). Fetal HRV showed no consistent changes before birth but increased when the foal was born (p &lt; 0.001), this increase being most pronounced in full-size foals (p &lt; 0.05). In conclusion, this study demonstrates both similarities and differences in peripartum endocrine and cardiac changes in horses of different size.<\/jats:p>","DOI":"10.3390\/ani10091577","type":"journal-article","created":{"date-parts":[[2020,9,4]],"date-time":"2020-09-04T11:24:24Z","timestamp":1599218664000},"page":"1577","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Differences in Endocrine and Cardiac Changes in Mares and Her Fetus before, during, and after Parturition in Horses of Different Size"],"prefix":"10.3390","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7990-1201","authenticated-orcid":false,"given":"Christina","family":"Nagel","sequence":"first","affiliation":[{"name":"Graf Lehndorff Institute for Equine Science, Vetmeduni Vienna, 16845 Neustadt (Dosse), Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maria","family":"Melchert","sequence":"additional","affiliation":[{"name":"Artificial Insemination and Embryo Transfer, Department for Small Animals and Horses, Vetmeduni Vienna, 1210 Vienna, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6077-7362","authenticated-orcid":false,"given":"Christine","family":"Aurich","sequence":"additional","affiliation":[{"name":"Artificial Insemination and Embryo Transfer, Department for Small Animals and Horses, Vetmeduni Vienna, 1210 Vienna, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J\u00f6rg","family":"Aurich","sequence":"additional","affiliation":[{"name":"Obstetrics, Gynecology and Andrology, Department for Small Animals and Horses, Vetmeduni Vienna, 1210 Vienna, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2020,9,4]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"22","DOI":"10.1111\/j.2042-3306.2011.00476.x","article-title":"Parturition, dystocia and foal survival: A retrospective study of 1047 births","volume":"44","author":"McCue","year":"2012","journal-title":"Equine Vet. 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