Silva, Elisa S. M.Cuervo-Arango Lecina, JuanNewcombe, John R.Producción Científica UCH 2023UCH. Departamento de Medicina y Cirugía Animal2023-07-052023-07-052023-03-05Silva, E.S.M., Newcombe, J.R. & Cuervo-Arango, J. (2023). The effect of treatment with oestradiol benzoate on oestrus expression and endometrial oedema in anovulatory and cyclic mares. Animals, vol. 13, i. 5 (05 mar.), art. 938. DOI: https://doi.org/10.3390/ani130509382076-2615 (Electrónico)http://hdl.handle.net/10637/14495Este artículo se encuentra disponible en la siguiente URL: https://www.mdpi.com/2076-2615/13/5/938Este artículo de investigación pertenece a la sección "Animal Reproduction".Oestrogens treatment is often used to induce oestrus behaviour in anoestrous mares to aid in the collection of stallion semen and as recipient mares to receive embryos when combined with progesterone. However, there are no studies to describe the effect of dose and individual mare on the intensity and duration of the response, in both anoestrous and cyclic mares. In Experiment 1, 13 anoestrous mares were treated with one of five doses of oestradiol benzoate (OB) (1, 1.5, 2, 3 and 4 mg) per mare in five consecutive treatment periods (n = 65), to determine the response in terms of endometrial oedema and oestrous behaviour. Experiment 2 and 3 used 3 mg of OB in cyclic mares to confirm or deny the presence of an active corpus luteum (CL). There was a dose rate of OB and individual mare effect (p < 0.05) on the intensity and persistence of endometrial oedema and oestrous behaviour. A total of 2 mg OB was enough to induce endometrial oedema and oestrous behaviour within 48 h in most mares. Mares with an active CL did not show endometrial oedema following treatment of 3 mg OB.application/pdfenopen accessEstro.Hormonas sexuales.Estrus.Caballos - Aparato genital.Caballos - Reproducción - Aspectos endocrinológicos.Caballos - Reproducción - Tratamiento hormonal.Horses - Reproduction - Hormone therapy.Horses - Reproduction - Endocrine aspects.Hormones, Sex.Horses - Generative organs.Artículohttps://doi.org/10.3390/ani13050938https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es