Estrus
is the period of sexual receptivity in the female
Estrous cycle
is the interval from the beginning of one estrus to the beginning of the next
Monoestrous
have only one estrous cycle per year
Polyestrous
have several estrous cycles per year
Anestrus
the relatively long period of inactivity in seasonally polyestrous anmals and is not properly a part of the sexual cycle
Proestrus
stage of the estrous cycle where follicles start secreting estrogen to prepare the reproductive system
Estrus
stage of the estrous cycle where the follicles will mature and the female accepts the male, horniest period in swines
Metestrus
stage in the estrous cycle where the corpus lutuem becomes functioning and secreting progesterone
Metestrus
last period of estrous cylce if pregnancy occurs, where further growth of uterus and progestational changes
Diestrus
longest phase of the estrous cycle
Diestrus
occurs only if the swine does not become pregnant, CL fully develops would be regreesing including the uterus
because they recycle the unfertilized uterus
why do other animals do not bleed like humans
Follicular phase
short phase-only 20% of cycle, period from regression of corpus luteum to ovulation
Estradiol
dominant hormone in follicular phase
Luteal phase
long phase- 80% of cycle, period from ovulation to corpus luteum regression
Progesterone
dominant hormone in luteal phase
2-3 days after the start of the estrous cycle
the best time for copulation of the swine