Semen

SEMEN

Q. 1

According to WHO criteria, the minimum normal sperm count is :

 A

10 million /ml

 B

20 million /ml

 C

40 million /ml

 D

60 million /ml

Q. 1

According to WHO criteria, the minimum normal sperm count is :

 A

10 million /ml

 B

20 million /ml

 C

40 million /ml

 D

60 million /ml

Ans. B

Explanation:

Ans. is b i.e. 20 million/ml

  1. Volume
  2. Sperm concentration
  3. Sperm motility
  4. Normal morphology
  5. Immunological or mixed agglutination reaction test
  6. White blood cells

2 ml

> 20 million / ml

> 50% progressive or > 25% rapidly progressive

> 50% normal forms

< 10% coated

< 1 million per ml

Normal seminal fluid analysis :

20 million / ml > 50% progressive or > 25% rapidly progressive > 50% normal forms < 10% coated < 1 million per ml " align="left" height="100" width="265">Other important values in semen Analysis :

pH = > 7.2

Round cells (including WBC + epithelial cells + immature cells) = < 5 million/ml. Sperm agglutination = <2

Basic semen Analysis includes only 4 measures : 1. Semen volume°

  1. Sperm concentration°
  2. Motility°
  3. Morpohology°
  • The specimen for semen analysis should be collected after 2 – 3 days of abstinence.
  • The specimen should be obtained by masturbation.
  • The specimen should be reach the laboratory within an hour of ejaculation.

Extra Edge :

  • Besides WHO criteria for evaluating sperm morphology, another ‘strict criteria’ by Kruger and Tygerberg is gaining importance. Strict sperm morphology represents the best current predictor of sperm function (the capacity to fertilize a mature oocyte) and has emerged as the most discriminating factor among infertile and

fertile men.

  • If > 14% sperms are of normal morphology by the strict criteria then only the semen considered as normal.

Teratospermia is < 4% normal sperms by the strict criteria and is an indicator of poor prognosis in assisted fertilization by ICSI in IVF cycles.

  • When no motile sperms are observed a sperm viability test differentiates viable non motile sperms from dead sperms.
  • Round cells in semen analysis includes epithelial cells. prostate cells. immature sperms (spermatogonia, round spermatids, spermatocytes) and leucocytes. If total round cells is > 5 million/ml it is abnormal. True leukocytospermia means > 1 million leukocytes/ml and requires semen culture for mycoplasma hominis, ureoplasma ureolyticum and Chlamydia.
  • Lymphocytes can be distinguished from other cells by immunoperoxide staining “Endtz Test”.

Q. 2

The effective sperm count normally is :

 A

20 million / ml

 B

30 million / ml

 C

40 million / ml

 D

50 million / ml

Q. 2

The effective sperm count normally is :

 A

20 million / ml

 B

30 million / ml

 C

40 million / ml

 D

50 million / ml

Ans. D

Explanation:

50 million / ml


Q. 3

Male infertility occurs if the sperm count is less than :

 A

100 mill / ml

 B

75 mill / ml

 C

50 mill / ml

 D

20 mill / ml

Q. 3

Male infertility occurs if the sperm count is less than :

 A

100 mill / ml

 B

75 mill / ml

 C

50 mill / ml

 D

20 mill / ml

Ans. D

Explanation:

20 mill / ml


Q. 4 Velocity of sperms in female genital tract is? 
 A 1- 3mm/day
 B 4-6 mm/day 
 C 6-8 mm/day
 D

8-10 mm/day

Q. 4 Velocity of sperms in female genital tract is? 
 A 1- 3mm/day
 B 4-6 mm/day 
 C 6-8 mm/day
 D

8-10 mm/day

Ans. A

Explanation:

1-3mm/day REF: Ganong’s 22′ ed p. 427, Guyton 11th edition page 999 Speed of sperm is 3mm/day (Ganong)

The normal motile, fertile sperm are capable of flagellated movement though the fluid medium at velocities of 1 to 4 mm/min. (Guyton)


Q. 5 Daily sperm production is? 
 A

3 million per day

 B 12 million per day 
 C

30 million per day

 D 120 million per 
Q. 5 Daily sperm production is? 
 A

3 million per day

 B 12 million per day 
 C

30 million per day

 D 120 million per 
Ans. D

Explanation:

120 million per day REF: Guyton 11th edition page 999

The two testes of the human adult form up to 120 million sperm each day”

Note:

  • The entire period of spermatogenesis, from spermatogonia to spermatozoa, takes about 74 days.
  • Although sperm can live for many weeks in the suppressed state in the genital ducts of the testes, life expectancy of ejaculated sperm in the female genital tract is only 1 to 2 days.

The two testes of the human adult form up to 120 million sperm each day.



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