from The American Heritage® Dictionary of the English Language, 4th Edition
- n. In female mammals, a short period of sexual quiescence between two estrus periods, during which the uterus is prepared for a fertilized ovum.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Alternative spelling of dioestrus.
from the GNU version of the Collaborative International Dictionary of English
- n. a state or interval of sexual inactivity or quiescence between periods of activity; -- of animals having several estrous cycles in one breeding season.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. (of animals having several estrous cycles in one breeding season) a state or interval of sexual inactivity or quiescence between periods of activity
After the eggs are released ovulation from the follicles, the follicles change from estrogen production to progesterone production and the dog enters a phase called diestrus.
Smears were characterized as diestrus if mostly polymorphonuclear leukocytes were present, proestrus when mostly small nucleated and some cornified cells were present, and estrus when the smear was completely cornified.
Since no males were present in this study, the females fed organic soy or no soy were appropriately untriggered (diestrus).
- PGF 2α will not be secreted, CL lives, producing progesterone, diestrus will last the duration of pregnancy - synthetic PGF 2α given during diestrus will kill CL and return animal to proestrus immediately; if pregnant animal will have abortion 3.
Hormones: - Progesterone is dominant hormone at this point - continued suppression of FSH/LH secretion by pituitary gland ensures quiescent ovary in case of pregnancy - progesterone levels maintain uterine development required to support pregnancy - during late diestrus (about day 17) uterus recognizes that is not pregnant:
Mares which are in the ambivalent early stages of estrus or which are mistakenly in diestrus pose a clear safety threat in close quarters.
When the mare is sexually inactive (during diestrus), the cervix is white, tightly contracted, and measures about 2. 4-3.1 inches (6-8 cm) long by 1. 6-2.0 inches (4-5 cm) wide.
The cervix 'appearance is quite different during estrus than during diestrus (when the mare is not cycling).
Magel-2 null females spend longer periods in estrus and diestrus, and experience fewer proestrus events (C-D).
The stages of estrous can be easily distinguished cytologically, with nucleated smears during proestrus, cornified smears during estrus, and leukocytic smears during diestrus.