The Stallion Flashcards
What % motility must sperm be to considered in puberty?
> 10%
What is the quantity of sperm in ejaculate?
50x10^6 sperm
What are 2 indicators of sexual maturity?
- Testicular size
2. Number of sperm
What is the most common method of sperm collection?
Artificial vagina
Name 6 things that are analysed in sperm?
- Semen volume
- Sperm concentration
- Total sperm number
- Motility
- Morphology
- Colour
Semen ____, sperm ______, total sperm _____, m______, m_____ and c___ are all methods of semen analysis.
Semen volume, sperm concentration, total sperm number, motility, morphology and colour are all methods of semen analysis.
What 2 factors influence semen volume?
1, Season
2. Sexual stimulation
What is the pH range of semen?
7.2-7.9
What is the most accurate method of determining sperm concentration?
Nucleocounter
What are the 4 abnormalities in sperm are there?
- Head defects
- Midpiece defects
- Tail defects
- Cytoplasmic droplets
H____ defects, M_____ defects, T__ defects and C____ d___ are abnormalities in sperm
Head defects, midpiece defects, tail defects and cytoplasmic droplets are abnormalities in sperm.
What are the 2 stains used to visualise sperm?
- Eosin-nigrosin
2. Buffered formalin saline (wet mount)
What are the 3 examination methods to assess the testes?
- US
- Measurement
- Palpation
What are 2 methods used to examine internal genitals of the stallion?
- Palpation per rectum
2. Ultrasound
What are 2 factors that are examined to determine daily sperm output (DSO)?
- Testicular measurements
2. Number of spermatozoa produced per day
What 2 things are used to assess sperm quality?
- Morphology
2. Motility
Name 3 factors play a part in daily sperm output?
- Testis volume
- Age
- Health
- Season
What 3 bacterial venereal diseases are considered pathogenic?
- Taylorella equigenitalis
- Klebsiella pneumoniae
- Pseudomona aeroginosa
Is semen quality affected with EHV-3?
No
What are the 3 criteria set for a breeding soundness exam?
- No abnormalities
- No venereal diseases
- > 1x10^9 sperm in 2nd ejaculate