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Gyn > Gyn 1 > Flashcards

Gyn 1 Flashcards

1
Q

What are the primordial germ cells derived from?

A

Epiblast

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

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2
Q

What is the process by which oogonia divide?

A

Mitosis

Oogonia undergo mitosis to increase in number before entering meiosis.

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3
Q

At what stage does the primary oocyte get arrested?

A

Diplotene stage of meiosis prophase

The primary oocyte remains arrested in this stage until puberty.

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4
Q

What resumes the meiosis of the primary oocyte?

A

Luteinizing Hormone (LH)

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

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5
Q

What is the fertilizable span of an ovum?

A

12-24 hours

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

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6
Q

What is the size of a mature follicle?

A

8-10 mm (up to 17 mm)

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

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7
Q

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

A

6-7 million

The number of follicles decreases significantly by birth.

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8
Q

How many follicles are present at birth?

A

1-2 million

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

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9
Q

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

A

Estrogen

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

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10
Q

What effect does estrogen have on FSH?

A

Negative feedback

Estrogen inhibits FSH secretion to regulate the menstrual cycle.

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11
Q

What initiates the LH surge before ovulation?

A

Estrogen

The LH surge is critical for triggering ovulation.

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12
Q

What maintains the LH surge?

A

Estrogen and progesterone

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

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13
Q

What are the two phases of the menstrual cycle?

A

Follicular phase and luteal phase

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

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14
Q

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

A

120 microns

This measurement reflects the average diameter of a human ovum.

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15
Q

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

A

True

The secondary oocyte remains arrested until fertilization occurs.

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16
Q

LH lutenises granulosa cell to form ?

A

Progesterone

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17
Q

Gynaecology Revision 1

A
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18
Q

progesterone :

A
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19
Q

main → Estrogen

A
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20
Q

Released by luteinised granulosa cells

A
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21
Q

→ Inhibin B.

A
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22
Q

Responsible for LH & FSH surge.

A
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23
Q

FSH

A
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24
Q

lutenises

A
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25
Q

LH

A
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26
Q

release

A
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27
Q

maink

A
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28
Q

Estrogen (E2)

A
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29
Q

Granulosa cell

A
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30
Q

Theca cell

A
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31
Q

Progesterone

A
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32
Q

Inhibin B (-ve

A
33
Q

feedback on FSH

A
34
Q

Androgens

A
35
Q

Aromatase

A
36
Q

Note :

A
37
Q

→Androgens

A
38
Q

Androgens Aromatase in adipose tissue to form ?

A

Estrogen E1

39
Q

Adipose tissue

A
40
Q

Estrogen (El

A
41
Q

Ovulation:

A
42
Q

Primary oocyte → Secondary oocyte.

A
43
Q

Follicle → Corpus luteum.

A
44
Q

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

A
45
Q

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

A
46
Q

LH peak i ovulation: 10-12 hours.

A
47
Q

Estrogen peak i LH surge: 14-24 hours.

A
48
Q

Day of ovulation:

A
49
Q

14 days prior to next menstruation.

A
50
Q

Length of cycle - 14 = Day of ovulation.

A
51
Q

second half of menstrual cycle:

A
52
Q

Second duration - Fixed.

A
53
Q

Luteal phase/secretory phase.

A
54
Q

Time duration fixed to 14 days.

A
55
Q

main hormone : Progesterone.

A
56
Q

Corpus luteum (CL) :

A
57
Q

CL in non pregnant females is maintained by LH.

A
58
Q

CL in pregnant females is maintained by HC

A
59
Q

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

A
60
Q

Hormone which prevents luteolysis HCG

A
61
Q

→ Endukante preg lo

A
62
Q

undadu kada .

A
63
Q

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

A
64
Q

corpus luteum produces :

A
65
Q

• progesterone mainy.

A
66
Q

• Estrogen.

A
67
Q

Inhibin A.

A
68
Q

7

A
69
Q

87

A
70
Q

Active space

A
71
Q

Granulasa

A
72
Q

→ Estrogen

A
73
Q

-Cel

A
74
Q

Lutenized

A
75
Q

Granul osa 1eUL

A
76
Q

→ Progester

A
77
Q

ist halt - Estrogen

A
78
Q

and halt - projesterona

A

Gyn (1 decks)

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