Fetal Period Flashcards

1
Q

14 weeks AOG

A

Gender can be identified by experienced examiners

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2
Q

16 weeks AOG

A

Lanugo starts to appear

Quickening can be felt by some mothers

Fetal CRL is 12

Gender can be determined by experienced observers by inspection of the externwl genitalia by 14 weeks

Quickening by multiparas

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3
Q

19 weeks AOG

A

Heart beat can be heard in almost all mothers

Nails start to form

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4
Q

20 weeks AOG

A

Downy lanugo hair covers the entire body

Start of vernix caseosa

Quickening in just about all patients

Fetus now weighs somewhat more than 300grams and weight begins to increase in a linear manner

Fetus moves about every minute and is active 10 to 30 percent of the time

Downy lanugo covers its entire body

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5
Q

28 weeks AOG

A

Skin is red and covered with vernix caseosa

90% chance of survival

Baby starts opening and closing eyes

Crown-rump length is approximately 25cm

Pupillary membrane has just disappeared from the eyes

Born at this age has a 90% chance of survival

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6
Q

32 weeks AOG

A

Testes start to descend

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7
Q

34 weeks AOG

A

Lanugo starts to disappear

Replaced by mature hair

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8
Q

36 weeks AOG

A

Body has become more round because of fat deposition

CRL of 32

Deposition of subcutaneous fat

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9
Q

40 weeks AOG

A

Testes in the inguinal canal or in the scrotum

Average crown-rump length is about 36cm

Weight is approximately 3400grams

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10
Q

12 weeks AOG

A

Uterus just palpable above the SP

Begins breathing movements

Gonadal gender has differentiated but cannot be identified yet

The uterus usually is just palpable above the symphysis pubis, crown-rump-length is 6 to 7 cm

Centere of ossification have appeared in most of the fetal bones

Fingers and toes have become differentiated

Skin snd nails have developed and scattered rudiments of hair appear

External genitalia are beginning to show definitive signs of male or female gender

Spontaneous movements

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11
Q

24 weeks AOG

A

Canalicular perriod of lung developmentis nearly completed

Fat deposition begins

Fetus born at this time will attempt to breathe, but many will die because the terminal sacs have not yet formed

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