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Maternal Newborn-MJ > Fetal Development PPT > Flashcards

Fetal Development PPT Flashcards

1
Q

Why do blastocyst secrete HCG?

A

To make sure the corpus lute remains viable

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2
Q

How long does the corpus lute secrete estrogen and progesterone?

A

First 2-3 months of pregnancy

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3
Q

What happens during the first weeks of human development?

A

Transport of embryo down uterine tube and into uterus

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4
Q

What is mitotic cellular replication?

A

Cleavage and occurs as baby (zygote) is propelled toward the uterus

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5
Q

How many cells in morula?

A

16

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6
Q

What is outer layer of cells of zygote?

A

Trophoblast

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7
Q

What are the inner layer of cells of zygote?

A

Blastocyst

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8
Q

What is the time period for when we refer to it as ovum?

A

Conception to day 14

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9
Q

What is the time period for when we refer to it as embryo?

A

Day 15 to 8 weeks

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10
Q

What happens in embryo period?

A

Organs are forming; greatest vulnerability

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11
Q

When do we refer to it as fetus?

A

8 weeks-birth

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12
Q

What all happens in the period when we refer to it as ovum?

A

This is when there is the cellular replication. It goes from zygote to blastocyst formation and has the differentiation into the 3 germ layers

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13
Q

Embryonic development stage: What are the 3 germ layers?

A

Ectoderm (outer)
Endoderm (inner)
Mesoderm (middle)

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14
Q

What germ layer is the trophoblast layer?

A

Ectoderm

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15
Q

What does ectoderm develop into?

A

Placenta
Integument
Neural tissue and glands
Nervous system

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16
Q

What does the mesoderm form into?

A
  • Circulatory system
  • Urinary and reproductive organs
  • Muscles
  • Bones
  • CT
  • Gentiourinary system
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17
Q

What does the endoderm form into?

A
  • Thymus
  • Thyroid
  • Digestive, respiratory, and parts of the GU system
18
Q

What is viability?

A

Capability to survive outside the uterus

19
Q

What is the major criteria for viability?

A

CNS function and O2 capability of lungs

20
Q

What is viability defined as?

A

Weight of 350, 400, or 500 g (varies by state) & 20 weeks past conception

In TN it is 20 weeks and 500 g

21
Q

What do shunts allow?

A

Most oxygenated blood to go to the brain

22
Q

Does maternal and fetal blood usually mix?

A

Not normally

23
Q

What does ductus venosus do?

A

Shunts around the liver–placenta does the work of the liver for the fetus

24
Q

What kind of shunt is a foramen oval? What does it do?

A

Right-left shunt; blood barrels right across from right atrium to left atria

25
Q

What has the shunt around the lung?

A

Ductus arteriosus

26
Q

The formation of blood

A

Hematopoiesis

27
Q

Hematopoiesis: The formation of blood starting in the _____ (_____)

A

Yolk sac; (3rd week)

28
Q

Hematopoietic: When do stem cells seed the liver function?

A

5th week

29
Q

When does hematopoiesis begin ?

A

6th week

30
Q

Hematipoietic: Stem cells seed the fetal bone marrow, spleen, thymus, and lymph nodes at _____

A

Week 8 and 11

31
Q

What factors determine blood type and when are they present in the erythrocytes?

A

Antigenic factors determine blood type and are present in the erythrocytes around 5 weeks

32
Q

What can we give if mom is Rh- and baby is Rh+?

A

Rhogam

33
Q

When does blood cells and heart functioning start?

A

3 weeks

34
Q

When is heart fully developed?

A

8 weeks

35
Q

When is lung movement seen?

A

11th week

36
Q

When are lungs fully mature?

A

34 weeks gestation

*just bc they have lung maturity at 34 weeks doesnt mean they know how to use the lungs…breathing (or the swelling of amniotic fluid) can be seen on an ultrasound

37
Q

Two separate pregnancies occurring simultaneously

  • 2 embryos
  • 2 placentas
  • 2 chorions
  • 2 amnions
A

Dizygotic twins

38
Q

Results from the division of a single fertilized ovum

  • Same sex
  • Same physical traits
A

Monozygotic twins

39
Q

What is di/di twins?

A

2 embryos, 2 sac, 2 placentas

Each embryo has their own amniotic sac and their own placenta (fraternal)

40
Q

What is mo/di twins?

A

2 embryos, 2 amniotic sac, 1 placenta

Each embryo has their own amniotic sac but share a placental (very unusual)

41
Q

What is mo/mo twins?

A

2 embryos, 1 sac, 1 placenta

42
Q

What type of twin is ALWAYS identical?

A

Mo/mo

Maternal Newborn-MJ (29 decks)

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