Chapter 2 Flashcards
The mare is considered to be _____ - breeds during spring/summer
seasonal polyestrus
What is the follicular phase
Estrus
mare is receptive to stallion; E2 is high
How long is the follicular phase
4-7 days
What is the luteal phase
Diestrus
mare is not receptive to stallion
How long is the average estrous cycle
18-24 days
_____ phase or _____ is when the mare is receptive to the stallion
Follicular; estrus
What are characteristics of estrus
- allows a stallion to sniff, nuzzle, and bite neck, flank, and perineal area
- stance will be raised tail without switching, hind legs spread apart and pelvis flexed
- winking
- frequent urination when teased
_____ is high during diestrus
P4
What is anestrus
the period of sexual inactivity (during winter months)
What is the natural breeding season
May - august
what is a hormone
chemical substance secreted by specialized ductless glands that are carried via the bloodstream to a specific target cell
Hormones originate from:
Hypothalamus Pituitary Gonads Uterus Placenta
what is the neutral control center for reproductive materials
the hypothalamus
the primary hormone released from the hypothalamus is
GnRH
