Swine reproduction
This presentation is the property of its rightful owner.
Sponsored Links
1 / 26

Swine Reproduction PowerPoint PPT Presentation


  • 74 Views
  • Uploaded on
  • Presentation posted in: General

Swine Reproduction. Rebecca Begoon 2/8/02. What is the point?. Why are we learning about swine reproduction? We need to breed the gilts in the barn We will be doing this by artificial insemination We need to know what we are doing . Objectives. Identify parts of the reproductive tract

Download Presentation

Swine Reproduction

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Swine reproduction

Swine Reproduction

Rebecca Begoon

2/8/02


What is the point

What is the point?

  • Why are we learning about swine reproduction?

    • We need to breed the gilts in the barn

    • We will be doing this by artificial insemination

    • We need to know what we are doing


Objectives

Objectives

  • Identify parts of the reproductive tract

  • Describe Estrous cycle, Estrus, and Ovulation


I reproductive tract

Ovaries

Infundibulum

Oviduct

Uterine horns

Uterine body

Cervix

Vagina

Vulva

I. Reproductive Tract


Ovaries

Ovaries

  • Primary Structure

  • Two Major Function:

    • To produce ova, the female germ cells

    • To produce the hormones progesterone and estrogen


Swine reproduction

Infundibulum

Acts like a funnel to collect ova

Diverts ova to the oviducts

Oviducts

6 to 10 inches long

Acts as site of fertilization


Uterine horns

Uterine Horns

  • 2 – 3 feet in a non-pregnant sow

  • Act as a passage way for sperm

  • Are the site of fetal development

  • Uterine body is located at junction of the uterine horns


Cervix

Cervix

  • Muscular junction between the vagina and uteri

  • Site of semen deposit

  • It is dilated during heat (estrus)

    • Constricted during pregnancy and when not in heat


Vagina

Vagina

  • Extends from the cervix to the vulva

  • Passage way for urine and piglets

  • The Bladder is connected to the vagina by the urethra


Vulva

Vulva

  • External part of the reproductive tract

  • Becomes red and swollen just prior to estrus


Activity

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

II. Estrous cycle, Estrus, Ovulation


Estrous cycle

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

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

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

Progesterone

  • Is responsible for maintaining Pregnancy !


Review

Review

  • How does Estrus cycle, estrus and ovulation relate?

  • Which hormone is responsible for the estrus cycle?

    • Estrogen


Review con t

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

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


  • Login