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OBS > Fetus 1 > Flashcards

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
Q

Criteria for macrosomia in abdominal circumference length

A

Greater than 35 cm

26
Q

Normal ratio of Femoral length and abdominal circumference

A

20 to 40%

27
Q

Site of fetal haematopoiesis until six weeks of pregnancy

A

Yolk sac

28
Q

Haemoglobin formed by yolk sac

A

Gower one and two

Portland Hb

29
Q

Site of Haematopoiesis until 20 weeks

A

Liver

30
Q

Site of haematopoiesis after 20 weeks

A

Bone marrow

31
Q

Hb F is formed in

A

Liver - upto 20 wks

32
Q

Site of formation of haemoglobin A

A

Bone marrow – after 20 weeks

33
Q

Fetal RBC’s are 

A

Nucleated and Macrocytic

34
Q

At time of birth, Hb concentration

A

16-18g/dl

35
Q

% of Hb F and HbA at birth

A

Hb F = 75-80%

Hb A= 20-25%

36
Q

Higher affinity for oxygen

A

HbF

37
Q

Which Hb Resistant to acid or alkali

A

Hb F

38
Q

Kleihauer betke test

A

Diff btw Fetal RBC and maternal RBc

39
Q

Acid elution test reagent.?

A

Citric acid phosphate buffer

40
Q

How to calculate Anti D in RH negative female.!?

A

Acid elution or Kleihauer betke test

41
Q

Fetal gross body movements

A

Seven weeks

42
Q

Testis formation

A

Seven weeks

43
Q

Ovary formation

A

Eight weeks

44
Q

Glucagon synthesis

A

Eight weeks

45
Q

Internal genitalia

A

10 weeks

46
Q

Breathing movements

A

11 Weeks

47
Q

Female external genitalia

A

12 weeks

48
Q

Male external genitalia

A

14 weeks

49
Q

Insulin production

A

14 weeks

50
Q

H-P axis

A

12 weeks

51
Q

Fetal urine production

A

12 weeks

52
Q

Meconium production

A

16 wks

53
Q

Fetal Ig M production

A

20 wks

54
Q

Ig G to fetus at

A

16 wks

55
Q

Surfactant production

A

20 weeks

OBS (13 decks)

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