Pak Dairy Info
Pakistan's 1st Online Dairy Farming Guide

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Contents

Introduction

Breeds

Selection of Animals

Farm Building

Management

Record Keeping

Sanitation & Hygiene

Nutrition

Reproduction

Breeding

Health

Body Condition Scoring

Milk Quality

Feasibility

Terminologies

Directory

Picture Gallery

Disorder of Fertilization

It may be due to fertilization failure or atypical fertilization. Fertilization failure may be due to death of sperm, death of egg before fertilization, structural and functional abnormalities in egg or sperm and physical barriers which prevent the gamete transport e.g. closure of fallopian tube. It may also be due to ovulatory failure as in case of COD.

Abnormalities of Egg:
Several morphological and functional abnormalities of eggs as

  • Giant egg

  • Big size egg

  • Oval shaped egg

  • Lentil shape egg

  • Rupture of zona pellucida

Abnormalities of Sperms:

  • Structural defect of DNA

  • Sperm aging - aged sperm have changes in acrosome

  • Life of sperm or egg and life of fertilization - fertilizable life is lost much earlier as compared to life of sperm. With aging ability to fertilize is lost and leakage of intracellular enzymes and constituents like cyclic ANP. Life of sperm is 24 hours while life of ovum is 12-18 hours.

Structural and Functional Causes of Fertilization Failure: 

Cause

Abnormality

Species

Mechanism

 

Structural Abnormalities

Congenital

Mesonephric cyst , uterus unicornuous or double cervix

Swine Cattle

Sperm transportation is affected

Acquired

Tubal adhesions, hydrosalpinx, pyosalpinx 

All species

Transportation mechanism is affected

Functional Abnormalities

Hormonal

COD, defective secretions from uterus

All species

ovulation and gamete transport is affected

Managemental

Delayed insemination, wrong time insemination, errors in estrous detection

Bovine

Death of sperm or ovum, fertilization does not occur

 

 
 

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