Obg Gynec

Question 1

The process of change spermatogonia → sperms and spermatid → sperms

Answer 1

① spermatogenesis

’ ② Spermatogenesis

Question 2

Time taken for spermatogenesis and average No of sperms produced perday

Answer 2

72-.74days and 14-16 days for passing through ductal system total 90 days

100million

Question 3

In which stage the oocyte gets arrested

Answer 3

Diplotene stage of prophase of meiosis 1

Question 4

Sex determination is done by which gene and mention the genes that favour in males And females respectively¿

Answer 4

SRY gene is the gene
In males Sox-9
In females rspo -1 and WnT-4

Question 5

What is the best method of sex determination and finding chromosome number?
And what are the other methods of sex determination?

Answer 5

Karyotyping best

Barr body x-1
And most common is looking at external genitalia

Question 6

What is aneuplody?

Answer 6

Triploidy
Trisomy
Monosomy

Question 7

How the development of gonads occur?

Answer 7

Urogenital system is derived from mesoderm intermediate mesoderm
Except urogenital sinus which is endoderm

6 weeks bipotential
If sry gene there from medulla testes arise till 7 week
And from cortex ovaries arises till 8 week

Question 8

First feature which distinguishes testes from ovaries are?

Answer 8

Testicular cords

Question 9

Development of ovaries in turner and Kline filter syndrome?

Answer 9

In turner no sry so ovaries develop but as another x is missing poorly developed ovaries are present

In klinefilter testes as sry is there

Question 10

Time taken for spermiogenisis

Answer 10

12-14 days

Question 11

What does following components change from spermatic to sperm
Nuclear material 
Golgi body
Mitochondria 
Microtubule

Answer 11

Head
Across Europe
Middle piece
Tail and axial filament
Endo is absent

Question 12

Fertizible span of sperm?

Fertile span of ovum?

Answer 12

48 -72 hrs

12-24 hrs

Question 13

The place of maturity of sperm is it testes or caudal end of epididymis?

Answer 13

Caudal end of epididymis

Question 14

Gene for motility and ion required?

Answer 14

Cats per and calcium

Question 15

Time taken for sperm to reach ampulla?

Answer 15

30 min

Question 16

Sperm motile in female genital tract

Answer 16

12 hrs

Question 17

Hormonal support for spermatogenesis?

Answer 17

Testosterone and Lh and fsh

Question 18

First stimulus for testosterone release

Answer 18

Hcg in pregnancy

Question 19

Blood testis Barrier is formed by

Answer 19

Serotonin and outer by leydig cells

Question 20

Explain oogenesis?

Answer 20

Starts intrauterine life
First mitosis then meiosis 1 arrested at diplotene stage of prophase
Then till puberty same surrounded by follicular cells then puberty time Lh surge occurs meiosis 1 resumes and form secondary oocyte
This again arrested at meiosis 2 metaphase at the fertiliszation meiosis 2 completes and female pro nucleus releases

Question 21

Time between Lh surge and ovulation

Answer 21

32-34hrs or24-36 hrs

Question 22

First and second polar body released at?

Answer 22

Ovulation and fertilisation

Question 23

Ova size

Answer 23

120mu

Question 24

No of follicles at 5 month, birth,at puberty

Answer 24

6-7 million
1-2million
4-5 lakhs

Question 25

Initial recurement of follicles is

Answer 25

Hormone independent

Question 26

Testosterone release starts at

Answer 26

7-8 weeks of intrauterine life And attains max at 15 weeks of intrauterine life Then decrease Low till puberty at 17 increases same as adult Daily 5-7 mg/day

Question 27

Estrogen uses in males

Answer 27

Bone density incre Closure of epiphysis of long bones Body fat maintained Sexual function