1 Cats: Cats normally have their first estrous cycle between 4 and 6 months of age, with the average age around 5 months. 2  The female cat has 2-4 estrous periods every year, each lasting 15-22 days. 3  If she is bred, estrus seldom lasts more than 4 days.
Lactate dehydrogenase (LD or LDH) is an enzyme involved in energy production that is found in almost all of the body's cells, with the highest levels found in the cells of the heart, liver, muscles, kidneys, lungs, and in blood cells; bacteria also produce LD.actate dehydrogenase (LD or LDH) is an enzyme involved in energy production that is found in almost all of the body's cells, with the highest levels found in the cells of the heart, liver, muscles, kidneys, lungs, and in blood cells; bacteria also produce LD.
ldh is the short form for the lactate dehydrogenase test this test is typically used as a measure of tissue damage in an individual it may be used to measure acute tissue damage which has occurred due to a recent illness or injuryactate dehydrogenase also known as ldh is an enzyme that is found in nearly all body tissues ldh is responsible for creating energy from glucose for cells normal levels of ldh range from 105 and 333 iu liter