SPERM MORPHOLOGY Flashcards
is evaluated with respect to the structure of the head, neckpiece, midpiece, and tail
Sperm morphology
Abnormalities in head morphology are associated with
poor ovum penetration
Abnormalities in neckpiece, midpiece, and tail
motility
____-shaped head approximately ____ and _____
Oval
5 μm long and 3 μm wide
Flagellar tail is approximately
45 μm long
Acrosomal cap should encompass
approximately ____ and cover approximately ____ of the sperm nucleus
half of the head
two-thirds
Midpiece is approximately ____ and is the _____ part of the tail because it is surrounded by a _____ that produces the energy required by the tail for motility
7.0 μm long
thickest
mitochondrial sheath
T/F
Evaluated from a thickly smeared, stained slide under oil immersion.
FALSE
thinly smeared
Staining can be performed using
wright’s, giemsa, shorr, or papanicolaou stain.
T/F
Air-dried slides are stable for 24 hours.
TRUE
At least ____ sperm should be evaluated and the percentage of abnormal sperm ____
200
reported
Abnormalities in Head Structure
- double heads
- giant and amorphous heads
- pinheads
- tapered heads
- constricted
Abnormal sperm tails
- frequently doubled
- coiled
- bent
An abnormally long neckpiece may cause the sperm head to bend ____ and interfere with ____
backward
motility
Routine criteria:
> 30% normal morphology
Kruger’s strict criteria:
> 14% normal morphology
T/F
At present, evaluation of sperm morphology using strict criteria is routinely performed in the clinical laboratory but is not recommended by the WHO.
FALSE
NOT routinely performed but is RECOMMENDED by WHO
WBCs:
<1,000,000
Greater than 1 million WBCs per milliliter per ejaculate indicates an ___ associated with ____ and poor sperm quality and may ___ sperm motility and DNA integrity
inflammatory condition
infection
impair
