An ejection fraction is most commonly measured during an echocardiogram. 1  This painless and noninvasive test uses high-frequency sound waves (ultrasound) to get a picture of the four heart chambers and the four heart valves. Ejection fraction can also be measured as part of other diagnostic testing, such as: 1  MUGA Scan: A type of radionuclide imaging test that provides clear pictures of blood flow through the heart's chambers and blood vessels.
Horses have a gestation period that lasts approximately 340 days. If that sounds like a long time to wait for the baby to be born, youâd be no better off raising llamas (350 days) or donkeys (365 days).
Quick Answer. The standard mare gestation length is from 320 to 362 days after the date of breeding, and on average, most mares will foal, or give birth, 330 to 345 days after a successful breeding. However, it is common for a mare to successfully give birth in a later period than the average range. Keep Learning.