“Length of estrous cycle is 7-8 days, Duration of estrus is 7-9 days and Time of ovulation is 1st or 2nd day of estrus in female dog”

“Some follicular activity of the ovaries may develop but a mature follicle and ovulation seldom occur during the anestrus period”

Signs of estrus in animals Signs of estrus in animals are nothing but behavioral changes when animal in estrus and about to conceive. Estrus signs are less pronounced in Buffaloes than cattle usually it’s called silent heat. –frequent urination, teat swelling, reduction in milk yield, bellowing. many buffaloes come to heat during night and this also makes

“In the cat, dog and primates PGF2α is not luteolytic and CL is maintained for 35-70 days known as pseudo pregnancy”

“Metestrum or Metestrus is largely under the influence of progesterone produced by the corpus luteum. This hormone, by inhibiting the secretion of FSH by the pituitary gland”

“The uterus is erect, turgid edematous in Estrus Phase of estrus cycle. The blood supply to the uterus is increased. The mucosa is rapidly growing and mucus is secreted”

“In all domestic animals except mare Folliculogenesis is depressed during pregnancy because of high level of progesterone”

“In all domestic animals that have attained puberty there is a definite physiological functional rhythm of the reproductive system called the estrous cycle. One cycle interval is defined as the time from the onset of one period of sexual receptivity to the next or as the interval between successive estrus”

“In many species ovulation occurs spontaneously after normal follicle growth during estrus cycle, this is known as Spontaneous ovulators but Induced ovulators are animals that do not ovulate spontaneously”

“The corpus luteum is one of the most vascular organs of the body. If animals are non–pregnant it is corpus luteum spurium and is destined to regress. If animal is pregnant, it is corpus luteum verum and corpus luteum is continues to function”