Equine fetal gender determination from mid- to advanced-gestation by ultrasound.
Equine fetal gender can be easily determined by ultrasound between Days 120 and 210. A combination of transrectal and transabdominal ultrasound examinations can visualise fetal sex organs up to 8 months of gestation. Early equine fetal sexing techniques, performed between approximately Days 58 and 70, are aimed at identifying the position of the genital tubercle. A wider diagnostic window, a diagnosis based on several parameters, and the ease of identification of fully developed fetal primary sex organs make gender diagnosis in mid- to advanced-gestation a preferable technique.
The Irish Equine Centre, Johnstown, Naas, Co. Kildare, Ireland. stefbucca@hotmail.com
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D000818:Animals; D005260:Female; D005835:Genitalia / Q000000981:diagnostic imaging / Q000196:embryology; D005865:Gestational Age; D006736:Horses; D008297:Male; D011247:Pregnancy; D012732:Sex Determination Analysis / Q000379:methods / Q000662:veterinary*; D014463:Ultrasonography / Q000379:methods / Q000662:veterinary*