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CHAP 7 - Reproductive Cyclicity - Coggle Diagram
CHAP 7 - Reproductive Cyclicity
Menstral Cycle
Differences from estrous cycle
no defined period of sexual receptivity
A period of endometrial sloughing called mestration
The timeline for description of the cycle begins with menses, not ovulation or estrus
3 distinct phases that reflect the condition of the uterine endometrium
Phase 1: Menses: ensometruum is sloughing to the exterior
Phase 2: Proliferative phase: follicles develop and secrete estradiol - the endometruum begins to grow and increases thichnesss
Phase 3: Secretory phase: dominated by CL that secretes progesterone and estradiol
Amenorrhea: lack of menstrual period from the same causes as anestrus
Consists of the physiological events that occur b/w successive menstrual periods
At the conclusion of the luteal phase in the mistral cycle, the endometrium is sloughed to the exterior (menstruation)
Estrous cycle
Consists of the physiologic events that occur b/w successive periods of sexual receptivity (heat) and/or ovulations
Anestrus: periods of time when estrous cycles cease
Causes:
pregnancy
season of year
lactation
stress
nutrition
pathology
True anestrus: insufficient hormonal stimuli
Lactational anestrus
Seasonal anestrus
Gestational anestrus
Apparent anestrus
Divided into 4 stages:
Proesrtrus
Estrus
Metestrus
Diestrus
Each cycle consists of a follicular phase and luteal phase
Follicular phase: dominated by estradiol secreted by ovarian follivcels
Luteal phase: dominated by progesterone from the corpus lute that prepares the repro tract for pregnancy
3 Types of estrus cyclicality
Seasonally polyestrous: display clusters of estrous cycles that occur only during a certain season of the year
Monstrous: have only one cycle per year
Polyestrous: cycle throughout the year