Glossary
Breeding Terms
- Corpus Hemerrhagicum (CH)
- This is the content of the follicle after
ovulation. It is filled with blood and then becomes the corpus lateum.
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- Corpus Lateum (CL)
- A growth at the site of ovulation. It
produces progesterone.
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- Diestrus Phase
- The phase of the estrous cycle immediately
following ovulation. It normally lasts 14 days.
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- Estrous Cycle
- One entire heat cycle. From one ovulation to
the next. It normally lasts for 21 to 23 days.
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- Estrus Phase
- The first phase of the estrous cycle. It
normally lasts from 4 to 7 days and ends with ovulation.
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- Follicle-Stimulating Hormone
(FSH)
- A hormone produced by the pituitary gland. It
causes the ovaries to produce egg follicles.
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- Follicular Phase
- See estrus phase
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- Gonadotropins
- A hormone produced by the pituitary gland (or
later in pregnancy by the placenta). It acts on the ovaries to produce sex
hormones.
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- Hypothalamus Gland
- A gland located in the brain that controls the
pituitary gland.
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- Luteinizing Hormone (LH)
- A hormone produced by the pituitary gland. It
causes the follicle to mature and ovulate.
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- luteolysis
- The process that causes the disappearance of
the corpus lateum.
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- Ovulation
- The process of the follicle releasing the egg
into the ovaries.
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- Progesterone
- The pregnancy hormone.
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- Prostaglandin (PGF2a)
- A hormone found in the lining of the uterus.
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- Winter Anestrus
- The period of sexual inactivity in a mare,
lasting typically from October through April in the Northern Hemisphere.