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Lesson 4.4 Puberty and the Estrous Cycle

Last updated over 5 years ago

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What is puberty

The stage during which the animal becomes sexually mature

The period in which the female is receptive to mating.

Identified by the first estrous.

Male 

Female

Able to produce sperm and has a desire to mate

Male 

Female

Production of ova, the development of the reproductive tract, and a desire for mating.

Male 

Female

Age of Puberty: 4-8 months

Heifer

Gilt

Ewe/Doe

Mare

Age of Puberty: 5-9 months

Heifer

Gilt

Ewe/Doe

Mare

Age of Puberty: 6-12 months

Heifer

Gilt

Ewe/Doe

Mare

Age of Puberty: 10-12 months

Heifer

Gilt

Ewe/Doe

Mare

What is estrus? 

The stage during which the animal becomes sexually mature

The period in which the female is receptive to mating.

What are the stages of estrus? (mark all that apply)

Estrus Phase

Progesterone Phase

Follicular Phase

Luteal Phase

Prostaglandin Phase

Estrus Cycle and Length of Estrus: C,18-21 Days and  AL, 18 Hours

Cattle

Swine

Horse

Sheep

Estrus Cycle and Length of Estrus: C,18-25 Days and  AL, 5 Days

Cattle

Swine

Horse

Sheep

Estrus Cycle and Length of Estrus: C, 18-24 Days and  AL, 3 Days

Cattle

Swine

Horse

Sheep

Estrus Cycle and Length of Estrus: C, 14-20 Days and AL, 30 Hours

Cattle

Swine

Horse

Sheep

What are the factors to determine bred maturity?

Physical Size

Vulva Size

Age

Testicle Size

Breed Standards