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The Role of Ovine Conceptus Secretory Proteins in the Establishment of Pregnancy
- Source :
- Cell and Molecular Biology of the Uterus ISBN: 9781468412994
- Publication Year :
- 1987
- Publisher :
- Springer US, 1987.
-
Abstract
- Sheep (Ovis aries) that are not pregnant have recurring estrous cycles of about 17 days’ duration during the breeding season, i.e., August through December to January. The first day of behavioral estrus is designated Day 0 with ovulation occurring about 30h after onset of estrus and the ovulatory surge of Luteinizing Hormone (LH). The estrous cycle is characterized by growth (Days 4–12) and then regression (luteolysis) of the corpus luteum (CL). Luteolysis begins on about Day 15 after onset of estrus. Prostaglandin F2-alpha (PGF), produced by the uterine endometrium, is the uterine luteolytic hormone in sheep (1). Beginning on Days 14 to 15 and continuing until the onset of the next period of estrus, PGF is released in a pulsatile manner. About 5 episodes of PGF release per 24h are required for luteolysis (2,3).
- Subjects :
- Gynecology
Estrous cycle
endocrine system
medicine.medical_specialty
urogenital system
media_common.quotation_subject
Uterus
Uterine horns
Biology
Andrology
medicine.anatomical_structure
Luteolysis
medicine
Conceptus
Luteinizing hormone
Corpus luteum
Ovulation
hormones, hormone substitutes, and hormone antagonists
reproductive and urinary physiology
media_common
Subjects
Details
- ISBN :
- 978-1-4684-1299-4
- ISBNs :
- 9781468412994
- Database :
- OpenAIRE
- Journal :
- Cell and Molecular Biology of the Uterus ISBN: 9781468412994
- Accession number :
- edsair.doi...........11e1076c0221276c27f06b8a896ebeb0