Exam 2: Sperm collection Flashcards
(45 cards)
what are the two ways we can collect sperm
mounting a sow/gilt in estrus (rare)
mounting a dummy sow (more common)
How is sperm collected using the mounting a sow/gilt in the estrus method
boar mount gilt/sow
penis is diverted from female to collection vesicle
collecting using the mounting a dummy sow
preferred
boar is trained to mount dummy
most boar studs have separate collection area and pen
problems with using mounting a sow/gilt in the estrus method
not as hygienic
difficult to do
boar may be too big for female
sows may walk around pen
pros of using the mounting a dummy sow method
female not required
adjustable height
good footing around the dummy makes it easier for boar
cleaner
can be cleaned
saliva from previous boar can help with arousal
after the boar has mounted the dummy, what needs cleaned
preputial opening and surrounding areas need cleaned with disposable wipe
hair may need to be trimmed
after the boar has mounted the dummy, what needs to be cleaned
preputial opening and surrounding areas need cleaned with disposable wipe
hair may need to be trimmed
why does the collector wear 2 pairs of gloves
the collector will massage the penis through the prepuce and evacuate preputial fluids in the prepuce
once boar extends his penis out of his sheath and thrust, the 1st pair comes off
then with the second pair of gloves on, the collector will grab the penis and apply pressure
the first few jets of ejaculate function to
flush out the urethra
should be allowed to go to the ground
clear, watery containing NO SPERM and HIGH BACTERIA
what is a common collection vesicle used in sperm collection
pre-warmed (100F) insulated thermos or styrofoam cup with a filter
should the gel-like fraction be filtered out of ejaculated
YES
a minimum of _____________ minutes is necessary for a boar to complete ejaculation with the average being ___________ minutes
5-7
7-15
Ejaculate volume can vary depending on
boar’s age
boars size
collection technique
frequency of technique
the complete process of collection
- boar investigates and mounts dummy
- prepuce cleaned
- massage prepuce
- remove the outer glove
- collector applies pressure to the corkscrew portion of the penis once extended from the sheath (uniform pressure, hold perpendicular)
- first part of ejaculate is discarded
- once thrusting stops, start collection
T/F latex kills sperm
TRUE
after sperm collection is complete, what is done
it is sent to the lab for evaluation and processing
high quality boar semen is essential for obtaining
satisfactory fertility rates
standard test uses to evaluate boar semen quality include
motility
morphology
concentration
normal semen appearance/consistency
milky, creamy consistancy
normal semen color
grey-white to white in color
**yellow, red= infection
normal semen total volume
200-400 mL
normal semen total sperm numbers
60-130 billion
**young= ~40 billion
**# drop if sick
normal semen: motile sperm
80%
normal semen: cytoplasmic droplets
less than 15%
