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Oestrous Cycle Pharmacological Manipulation - Anatomy & Physiology

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Anatomy and PhysiologyWikiAnt and Phys Banner.png
()Map REPRODUCTIVE SYSTEM (Map)
FEMALE REPRODUCTIVE TRACT
OESTROUS CYCLE



Introduction

Factors Influencing Reproduction

Hormones

  • Pulsatile GnRH secretion.
  • Gonadotrophins LH and FSH
  • Gonadal steroids e.g. Oestrogen and Progesterone
  • Inhibin, inhibiting FSH
  • Prostaglandin F2α, causes luteolysis in the non-pregnant cycle

Environment

  • Day length (short and long day breeders)
  • Housing conditions (group v.s individual)

Nutrition

Manipulation of the Oestrous Cycle in Various Species

Sheep

Factors to Consider Before Deciding which Method to Use

Physiological: The Ram Effect

Pharmacological: Progestagens

Intravaginal Sponges

Pharmacological: Prostaglandins

Pharmacological: Melatonin

Cow

Controlling Oestrous

Pharmacological: Prostaglandins

Pharmacological: Progestagens

Mare

Reasons to Control the Oestrous Cycle

Control in the Transition Period

Control in the Breeding Period

Inducing Ovulation

Sow

Pharmacological: Progestagens

Pharmacological: Gonadotrophins

Bitch

Pharmacological: Progesterone

Pharmacological: Synthetic Progestagens

Proligestone (PRG)

Pharmacological: Testosterone

Queen

Pharmacological: hCG

Pharmacological: Androgens

Pharmacological: Synthetic Progesterone

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