Swine Reproduction (Cont'd) | Sam Houston State University - Edubirdie

University:
Sam Houston State University
Course:
BIOL 1406 | General Biology I
Academic year:

2019
Views:

309

Pages:

13
Author:

5CelestialChronicle

Vulva  External part of the reproductive tract  Becomes estrus red and swollen just prior to Activity  With a partner, you will put together a model of a gilt’s reproductive tract, just like the picture used during lecture, using play dough.  The supplies will be located at the front of the room. II. Estrous cycle, Estrus, Ovulation Estrous Cycle  Normally 21 days long  Can range from 18-24 days long  Non-pregnant and non-lactating sows will estrus or standing heat Estrus or Heat  Follicles – 6 to 10 will form on each ovary – Growth begins 3 days before estrus  FSH (Follicle Stimulating Hormone) released from the pituitary gland  Maturing ovum is held in each follicle  Estrogen is secreted (responsible for estrus)  Ovulation is stimulated by LH (Luteinizing Hormone) Signs of Estrus  Standing Heat – standing to be mounted or “back pressure test” – Red, swollen vulva – Increased nervous activity – Desire to seek boar – Decrease in appetite – Vaginal mucous Progesterone Is responsible for maintaining Pregnancy ! Review  How does Estrus cycle, estrus and ovulation relate?  Which hormone is responsible for the estrus cycle? – Estrogen Review con’t  Which hormone is responsible for maintaining pregnancy? – Progesterone  What are the signs of estrus? Standing Heat – standing to be mounted or “back pressure test” – – – – – Red, swollen vulva Increased nervous activity Desire to seek boar Decrease in appetite Vaginal mucous Reality!!! • In four days the gilts will be in heat and you all will have a chance to Artificially inseminate one of the gilts.  It is important to understand the reproductive tract and cycles.  Tomorrow we will practice on a model of a gilt

Related Documents

Swine Reproduction (Cont'd)

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