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Fetus 1 Flashcards

1
Q

Definition of Fetal Growth Period.

A

Calculated from day of Ovulation/Fertilisation.
i.e D14 of cycle.
Not D1 of pregnancy

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2
Q

Cardiac Activity is seen at

A

5th week of preg or 3rd week after fertilisation.

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3
Q

Name the Three Fetal Growth periods.

A

1) Fertilised ova- upto 4 wks of preg.
2) Embryonic period - 5 - 10 wks of preg.
3) Fetal Period - 11 wks till Delivery.

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4
Q

Most teratogenic period of pregnancy

A

1st trimester.

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5
Q

1st Trimester

A

uptil 13 wks + 6 days

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6
Q

2nd Trimester

A

14 weeks til 27 wks + 6 days.

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7
Q

3rd Trimester

A

28 wks till 40 wks.

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8
Q

Clinical assessment by Fundal Height.

1) 12 wks
2) 16wks
3) 20 wks
4) 24 wks
5) 28 wks.
6) 32 wks.
7) 36 wks.
8) 40 wks.

A

1) Pubic symphysis
2) Midway btw Pubis symphysis and Umbilicus
3) Lower border of umbilicus
4) Upper border of umbilicus
5) 1/3 btw Xiphisternum and umbilicus
6) 2/3 btw xiphisternum and umbilicus
7) Xiphisternum.
8) due to dragging down again at the level of 2/3 btw xiphisternum and umbilicus.

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9
Q

What is Lightening or welcome sign.?

A

lower of height of uterus at 40 weeks to the level of 2/3 btw xiphisternum and umbilicus thereby decreasing the maternal resp discomfort.

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10
Q

First trimester Fetal age estimation Best parameter

A

Crown rump length

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11
Q

Second trimester Best parameter for estimation of fetal age

A

Biparietal diameter> Head circumference

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12
Q

Third trimester Best parameter for age estimation

A

Femur length

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13
Q

CRL

A

Crown rump length

From vertex to coccyx

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14
Q

CRL + 6.5mm

A

GA in wks

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15
Q

CRL + 42

A

GA in days

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16
Q

Missed abortion signs via CRL

A

If CRL > 7 mm with no cardiac activity

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17
Q

BPD

A

Outer table of one side to be inner table of fetal skull on the other side
Best parameter for age assessment in second trimester

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18
Q

HASSE rule

A

<5 m = Square root of fetal length = GA

>5 m= Fetal length by 5 =GA

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19
Q

Crown heel length

A

Vertex to Heel length in fetus above 5 m of age

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20
Q

Clinical assessment of Wgt of fetus

A

Johnson formula

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21
Q

USG assessment of Fetal wgt

A

Shepherd or Hadlock formula

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22
Q

Parameter for USD assessment of fetal growth

A

Abdominal circumference

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23
Q

Plane of measurement of abdominal circumference in USG

A

Measured in a plane where portal sinus, Umbilical vein and fetal stomach must be visible.

24
Q

Only parameter that indicates IUGR and macrosomia

A

Abdominal circumference

25
Criteria for macrosomia in abdominal circumference length
Greater than 35 cm
26
Normal ratio of Femoral length and abdominal circumference
20 to 40%
27
Site of fetal haematopoiesis until six weeks of pregnancy
Yolk sac
28
Haemoglobin formed by yolk sac
Gower one and two | Portland Hb
29
Site of Haematopoiesis until 20 weeks
Liver
30
Site of haematopoiesis after 20 weeks
Bone marrow
31
Hb F is formed in
Liver - upto 20 wks
32
Site of formation of haemoglobin A
Bone marrow – after 20 weeks
33
Fetal RBC’s are 
Nucleated and Macrocytic
34
At time of birth, Hb concentration
16-18g/dl
35
% of Hb F and HbA at birth
Hb F = 75-80% | Hb A= 20-25%
36
Higher affinity for oxygen
HbF
37
Which Hb Resistant to acid or alkali
Hb F
38
Kleihauer betke test
Diff btw Fetal RBC and maternal RBc
39
Acid elution test reagent.?
Citric acid phosphate buffer
40
How to calculate Anti D in RH negative female.!?
Acid elution or Kleihauer betke test
41
Fetal gross body movements
Seven weeks
42
Testis formation
Seven weeks
43
Ovary formation
Eight weeks
44
Glucagon synthesis
Eight weeks
45
Internal genitalia
10 weeks
46
Breathing movements
11 Weeks
47
Female external genitalia
12 weeks
48
Male external genitalia
14 weeks
49
Insulin production
14 weeks
50
H-P axis
12 weeks
51
Fetal urine production
12 weeks
52
Meconium production
16 wks
53
Fetal Ig M production
20 wks
54
Ig G to fetus at
16 wks
55
Surfactant production
20 weeks

OBS (13 decks)

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