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Maternity > Conception And Prenatal Development > Flashcards

Conception And Prenatal Development Flashcards

1
Q

somatic cells are produced by :

A

mitosis

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2
Q

gametogenesis occurs :

A

in meiosis

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3
Q

what is zygote?

A

fertilization of ovum

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4
Q

what is the duration of pre-embryonic period ?

A

0-2 weeks

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5
Q

what is a morula?

A

12-16 cells of conceptus , resembles a mullberry

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6
Q

what is a blastocyst?

A

a fluid filled sac of cells within an inner cell mass

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7
Q

inner cell mass :

A

embryoblast , fetus

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8
Q

trophoblast fetal

A

membranes and placenta

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9
Q

what is a decidua?

A

the endometrium

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10
Q

where is the implantation location?

A

the upper uterus,

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11
Q

why the upper uterus?

A

rich blood supply, thick uterine lining, limits blood loss after birth

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12
Q

what produces HCG?

A

the zygote

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13
Q

what does the corpus luteum do?

A

produces progestrone and estrogen until the placenta takes over

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14
Q

waht is the chorionic villi?

A

fetal side of placenta

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15
Q

decidua basalis :

A

maternal of side of placenta

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16
Q

what is the duration od the embryonic period ?

A

3rd to the 8th week

17
Q

what happens to during the embryonic period ?

A

basic body structures or major body organs are completed ,

18
Q

what does the mesoderm form?

A

bone, muscle , heart and blood vessels

19
Q

what does the endoderm form?

A

mucus membrane and glands

20
Q

what is the duration of the fetal period ?

A

9th week to birth

21
Q

weeks 9-12

A

gentilia formed

22
Q

weeks 13-16

A

Multi para may feel first movements (quickening)

23
Q

weeks 17-20

A

“butterflies”

24
Q

weeks 25-28

A

fetus more likely to survive extra uterine

25
Q

weeks 33-38

A

testes in the scrotum

26
Q

weeks 37-40

A

term fetus

27
Q

what is succenturate ?

A

small extra lobe is present

28
Q

what is circumvallate ?

A

an opaque ring is seen on the placenta

29
Q

what is battledore?

A

umbilical cord is attached close to margin of the placenta

30
Q

what is velamentous insertion of cord ?

A

cord is inserted into membranes away from the placenta

31
Q

what are the layers of the fetal membrane?

A

chorion ; thick opaque membrane derived from trophoblast, amnion ; inner layer, translucent membrane

32
Q

what is wharton jelly?

A

is surrounds the umbilical cord , prevents compression of blood vessels

33
Q

what is monosomy?

A

each body cell has a missing chromosome , turner’s syndrome (it always happens in females)

34
Q

what is trisomy?

A

each cell has an extra chromosome , down syndrome

Maternity (5 decks)

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