SPERM MORPHOLOGY

Question 1

is evaluated with respect to the structure of the head, neckpiece, midpiece, and tail

Answer 1

Sperm morphology

Question 2

Abnormalities in head morphology are associated with

Answer 2

poor ovum penetration

Question 3

Abnormalities in neckpiece, midpiece, and tail

Answer 3

motility

Question 4

____-shaped head approximately ____ and _____

Answer 4

Oval
5 μm long and 3 μm wide

Question 5

Flagellar tail is approximately

Answer 5

45 μm long

Question 6

Acrosomal cap should encompass
approximately ____ and cover approximately ____ of the sperm nucleus

Answer 6

half of the head
two-thirds

Question 7

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

Answer 7

7.0 μm long
thickest
mitochondrial sheath

Question 8

T/F
Evaluated from a thickly smeared, stained slide under oil immersion.

Answer 8

FALSE
thinly smeared

Question 9

Staining can be performed using

Answer 9

wright’s, giemsa, shorr, or papanicolaou stain.

Question 10

T/F
Air-dried slides are stable for 24 hours.

Answer 10

TRUE

Question 11

At least ____ sperm should be evaluated and the percentage of abnormal sperm ____

Answer 11

200
reported

Question 12

Abnormalities in Head Structure

Answer 12

• double heads
• giant and amorphous heads
• pinheads
• tapered heads
• constricted

Question 13

Abnormal sperm tails

Answer 13

• frequently doubled
• coiled
• bent

Question 14

An abnormally long neckpiece may cause the sperm head to bend ____ and interfere with ____

Answer 14

backward
motility

Question 15

Routine criteria:

Answer 15

> 30% normal morphology

Question 16

Kruger’s strict criteria:

Answer 16

> 14% normal morphology

Question 17

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.

Answer 17

FALSE
NOT routinely performed but is RECOMMENDED by WHO

Question 18

WBCs:

Answer 18

<1,000,000

Question 19

Greater than 1 million WBCs per milliliter per ejaculate indicates an ___ associated with ____ and poor sperm quality and may ___ sperm motility and DNA integrity

Answer 19

inflammatory condition
infection
impair