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Chapter 21

ANSC 101 Chapter Notes - Chapter 21: Ovulation, Urination, Estrous Cycle


Department
Animal Science
Course Code
ANSC 101
Professor
Dr.Moyes
Chapter
21

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ANSC Chapter 21 female reproduction
Reproductive efficiency
- Number of calves per 100 breeding females
- Number of piglets per litter
- Focal point of animal productivity, twice and important as growth or carcass
performance.
Basic structure
- Anatomy is similar across species
- Differing physiology between animals that have litters versus single offspring versus
eggs
Ovaries
- Ova-egg
- Largest cell in the body
- Develops inside the follicle in the ovary
- Follicle: estrogen producing structure that helps the egg mature
- Corpus luteum: remains of the follicle which produces progesterone
Oviduct
- Infundibulum
-entrance
-ova
- Fertilization
-sperm and egg
Uterine Horns
- Site of fetal implantation and development in swine, canines and felines
- Short in other species
Cervix
- Connective tissue
- Barrier to keep bacteria and fungus out
- Open and moist during estrus
- Closed with mucus plug during pregnancy
Vagina
- Birth canal
- Organ of copulation
- Urination
Ovary
- At hatch, both right and left present
- 4000 ova at birth
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