Gyn 1

Question 1

What are the primordial germ cells derived from?

Answer 1

Epiblast

Primordial germ cells are the precursors to gametes and originate from the epiblast layer during embryonic development.

Question 2

What is the process by which oogonia divide?

Answer 2

Mitosis

Oogonia undergo mitosis to increase in number before entering meiosis.

Question 3

At what stage does the primary oocyte get arrested?

Answer 3

Diplotene stage of meiosis prophase

The primary oocyte remains arrested in this stage until puberty.

Question 4

What resumes the meiosis of the primary oocyte?

Answer 4

Luteinizing Hormone (LH)

The resumption of meiosis occurs at puberty, triggered by hormonal changes.

Question 5

What is the fertilizable span of an ovum?

Answer 5

12-24 hours

This is the time frame during which fertilization can occur after ovulation.

Question 6

What is the size of a mature follicle?

Answer 6

8-10 mm (up to 17 mm)

Mature follicles are essential for ovulation and vary slightly in size.

Question 7

What is the maximum number of follicles present at 5 months of intrauterine life?

Answer 7

6-7 million

The number of follicles decreases significantly by birth.

Question 8

How many follicles are present at birth?

Answer 8

1-2 million

This number reflects a significant loss from the maximum observed in utero.

Question 9

What is the main hormone in the first half of the menstrual cycle?

Answer 9

Estrogen

Estrogen plays a crucial role in the proliferative phase of the menstrual cycle.

Question 10

What effect does estrogen have on FSH?

Answer 10

Negative feedback

Estrogen inhibits FSH secretion to regulate the menstrual cycle.

Question 11

What initiates the LH surge before ovulation?

Answer 11

Estrogen

The LH surge is critical for triggering ovulation.

Question 12

What maintains the LH surge?

Answer 12

Estrogen and progesterone

Both hormones play a role in sustaining the LH surge post-ovulation.

Question 13

What are the two phases of the menstrual cycle?

Answer 13

Follicular phase and luteal phase

These phases correspond to the pre-ovulation and post-ovulation periods in the menstrual cycle.

Question 14

Fill in the blank: The size of an ovum is ______.

Answer 14

120 microns

This measurement reflects the average diameter of a human ovum.

Question 15

True or False: The secondary oocyte is arrested in metaphase of meiosis II.

Answer 15

True

The secondary oocyte remains arrested until fertilization occurs.

Question 16

LH lutenises granulosa cell to form ?

Answer 16

Progesterone

Question 17

Gynaecology Revision 1

Question 18

progesterone :

Question 19

main → Estrogen

Question 20

Released by luteinised granulosa cells

Question 21

→ Inhibin B.

Question 22

Responsible for LH & FSH surge.

Question 23

FSH

Question 24

lutenises

Question 25

LH

Question 26

release

Question 27

maink

Question 28

Estrogen (E2)

Question 29

Granulosa cell

Question 30

Theca cell

Question 31

Progesterone

Question 32

Inhibin B (-ve

Question 33

feedback on FSH

Question 34

Androgens

Question 35

Aromatase

Question 36

Note :

Question 37

→Androgens

Question 38

Androgens Aromatase in adipose tissue to form ?

Answer 38

Estrogen E1

Question 39

Adipose tissue

Question 40

Estrogen (El

Question 41

Ovulation:

Question 42

Primary oocyte → Secondary oocyte.

Question 43

Follicle → Corpus luteum.

Question 44

Time betweet pLH surge & Estrogen = 200p9 for 48 days-

Question 45

LH surge & ovulation: 32-36 hours > 24-36 hours.

Question 46

LH peak i ovulation: 10-12 hours.

Question 47

Estrogen peak i LH surge: 14-24 hours.

Question 48

Day of ovulation:

Question 49

14 days prior to next menstruation.

Question 50

Length of cycle - 14 = Day of ovulation.

Question 51

second half of menstrual cycle:

Question 52

Second duration - Fixed.

Question 53

Luteal phase/secretory phase.

Question 54

Time duration fixed to 14 days.

Question 55

main hormone : Progesterone.

Question 56

Corpus luteum (CL) :

Question 57

CL in non pregnant females is maintained by LH.

Question 58

CL in pregnant females is maintained by HC

Question 59

Life span of CL in non pregnant females : 12-16 days.

Question 60

Hormone which prevents luteolysis HCG

Question 61

→ Endukante preg lo

Question 62

undadu kada .

Question 63

maximum size and activity of CL seen on 8th day after ovulation/ Daa of cycle.

Question 64

corpus luteum produces :

Question 65

• progesterone mainy.

Question 66

• Estrogen.

Question 67

Inhibin A.

Question 68

7

Question 69

87

Question 70

Active space

Question 71

Granulasa

Question 72

→ Estrogen

Question 73

-Cel

Question 74

Lutenized

Question 75

Granul osa 1eUL

Question 76

→ Progester

Question 77

ist halt - Estrogen

Question 78

and halt - projesterona