Fertilization and Implantation: Embryonic and Fetal Development Flashcards
(108 cards)
1
Q
PRENATAL DEVELOPMENT: Fertilization and Implantation
A
First Month
2
Q
PRENATAL DEVELOPMENT: Embryonic period
occurs from the 3rd to
the 8th week of
development and is the
time when the three
germ layers, ectoderm,
mesoderm, and
endoderm, give rise to
a number of specific
tissues and organs.
A
First Month
3
Q
PRENATAL DEVELOPMENT: Development of nervous system
A
First Month
4
Q
PRENATAL DEVELOPMENT:Development of the
nervous system.
A
First Month
5
Q
PRENATAL DEVELOPMENT:Embryo is 1⁄2 inch long.
A
First Month
6
Q
PRENATAL DEVELOPMENT:The heart has
formed. Heart begins
to beat faintly.
A
Second month
7
Q
PRENATAL DEVELOPMENT: Fingers and toes
develop.
A
Second month
8
Q
PRENATAL DEVELOPMENT: The arms bend at
elbows.
A
Second month
9
Q
PRENATAL DEVELOPMENT: External ears, eyes,
eyelids, liver, and
upper lip have begun
forming.
A
Second month
10
Q
PRENATAL DEVELOPMENT: The sex organs are
the same in all
embryos until the 7 th
or 8 th week. If a
gene triggers the
development of
testes, the embryo
develops as a male. If
there is no trigger, the
embryo develops
ovaries and becomes
female.
A
Second month
11
Q
PRENATAL DEVELOPMENT: Tail disappears. Embryo is 1 inch
long.
A
Second month
12
Q
PRENATAL DEVELOPMENT:The embryo develops into a fetus after 10 weeks.
A
Third Month
13
Q
PRENATAL DEVELOPMENT: Bones begin
hardening.
A
Third Month
14
Q
PRENATAL DEVELOPMENT: Begins making
spontaneous
movements
A
Third Month
15
Q
PRENATAL DEVELOPMENT:Digestive organ
begins to function.
A
Third Month
16
Q
PRENATAL DEVELOPMENT: Kidneys start making
urine.
A
Third Month
17
Q
PRENATAL DEVELOPMENT:Posture becomes
less curled and more
upright. Fetus is 3 inches long and weighs 1 ounce.
A
Third Month
18
Q
PRENATAL DEVELOPMENT: Hair begins to grow.
A
Fourth Month
19
Q
PRENATAL DEVELOPMENT: Head is more erect.
A
Fourth Month
20
Q
PRENATAL DEVELOPMENT: Sex organs are fully
formed.
A
Fourth Month
21
Q
PRENATAL DEVELOPMENT: Heart and blood
vessels are fully
formed.
A
Fourth Month
22
Q
PRENATAL DEVELOPMENT: Fetus is 7 inches and
weighs 5 ounces.
A
Fourth Month
23
Q
PRENATAL DEVELOPMENT: Lanugo —a fine,
downy hair — covers
the body.
A
Fifth Month
24
Q
PRENATAL DEVELOPMENT: Vernix caseosa, a
greasy material, covers and protects the skin.
A
Fifth Month
25
PRENATAL DEVELOPMENT: Ears and nose begin to develop cartilage.
Fifth Month
26
PRENATAL DEVELOPMENT: Fingernails and
toenails begin to
appear.
Fifth Month
27
PRENATAL DEVELOPMENT: Can suck a thumb,
yawn, stretch, make
faces and grasp.
Fifth Month
28
PRENATAL DEVELOPMENT: Gender of the fetus
may be determined.
Fifth Month
29
PRENATAL DEVELOPMENT: Fetus is 12 inches long and weighs 14 ounces.
Fifth Month
30
PRENATAL DEVELOPMENT: Extremely preterm -
born at or before 25 weeks of pregnancy
Fifth Month
31
PRENATAL DEVELOPMENT: Eyes and eyelids fully formed
Sixth Month
32
PRENATAL DEVELOPMENT: Fat developing under skin
Sixth Month
33
PRENATAL DEVELOPMENT: Fetus is 14 inches
long and weighs 2 pounds
Sixth Month
34
PRENATAL DEVELOPMENT: By 21st-22nd week,
CRL (Crown Rump
Length) is about 7 Inches
Sixth Month
35
PRENATAL DEVELOPMENT: (CRL – length from
top of the head to
bottom of buttocks)
Sixth Month
36
PRENATAL DEVELOPMENT: By 23rd-24th week,
CRL is about 8
inches
Sixth Month
37
PRENATAL DEVELOPMENT: Bone marrow begins
making blood cells
Sixth Month
38
PRENATAL DEVELOPMENT: Taste buds begin to
form
Sixth Month
39
PRENATAL DEVELOPMENT: Cerebral Cortex of
the brain rapidly
develops
Seventh Month
40
PRENATAL DEVELOPMENT: Fetus is 16 inches
long and weighs 3
pounds
Seventh Month
41
PRENATAL DEVELOPMENT: Fetus further
develops fat until the
end of the pregnancy
Seventh Month
42
PRENATAL DEVELOPMENT: By 26th – 27th week,
CRL is about 9
inches
Seventh Month
43
PRENATAL DEVELOPMENT: Eyelids are usually
fused together until
28th week
Seventh Month
44
PRENATAL DEVELOPMENT: By 28th – 29th week,
CRL is about 10
inches
Seventh Month
45
PRENATAL DEVELOPMENT: Fetus is 17 inches
long and weighs 5
pounds
8th Month
46
PRENATAL DEVELOPMENT: By 29th – 30th week,
CRL is about 10.5
inches
8th Month
47
PRENATAL DEVELOPMENT: In male fetus, testes
begin to descend into
scrotum by 30th -
34th week,
completing on 40th week
8th Month
48
PRENATAL DEVELOPMENT: By 31st – 32nd week,
CRL is about 11
inches
8th Month
49
PRENATAL DEVELOPMENT: Lanugo begins falling
off
8th Month
50
PRENATAL DEVELOPMENT: Fingernails extend
beyond the fingertips
8th Month
51
PRENATAL DEVELOPMENT: Subcutaneous fat is
stored for later use
8th Month
52
PRENATAL DEVELOPMENT: Lanugo is shed
9th month
53
PRENATAL DEVELOPMENT: Eyes have developed
enough to constrict
and dilate
9th month
54
PRENATAL DEVELOPMENT: Organ systems actively
function
9th month
55
PRENATAL DEVELOPMENT: Fetus is considerably
fatter, and skin is no
longer wrinkled
9th month
56
PRENATAL DEVELOPMENT: Vernix is present
9th month
57
PRENATAL DEVELOPMENT: Fetus settles into
position for birth
(Position vs
Presentation “Position”
refers to fetal
orientation in the
womb. “Presentation”
refers to which part of
the fetus is
leading/closest to the
birth canal)
9th month
58
PRENATAL DEVELOPMENT: By 33rd – 34th week,
CRL is about 12 inches
● By 35th – 36th week,
CRL is about 12.5
inches
9th month
59
PRENATAL DEVELOPMENT: By 37th – 38th week,
CRL is about 13-14
inches
10th month
60
PRENATAL DEVELOPMENT Fetus has a firm grasp
10th month
61
PRENATAL DEVELOPMENT: Nearly all of the vernix
and lanugo are gone
10th month
62
PRENATAL DEVELOPMENT: On average, Neonate
(Newborn) is around
18- 22 inches long
and weighs around
7-8 pounds
10th month
63
CHANGES IN MOTHER: Missed menstrual period
1st Month
64
CHANGES IN MOTHER: Possible feeling of
fatigue, feeling bloated,
frequent urination,
mood swings, nausea,
and tender or swollen
breasts
● Not all women get these
symptoms
1st Month
65
CHANGES IN MOTHER: Pregnancy symptoms are
more noticeable.
2nd Month
66
CHANGES IN MOTHER: Breast tenderness,
fatigue, frequent
urination, heartburn,
nausea, and vomiting
usually get worse.
2nd Month
67
CHANGES IN MOTHER: Produces extra blood
during pregnancy, and
heart beats faster and
harder than usual to carry
the extra blood
2nd Month
68
CHANGES IN MOTHER: Most symptoms from the
1st and 2nd month
continue and sometimes
worsen.
3rd Month
69
CHANGES IN MOTHER: Breasts enlarge and
areolas become larger
and darker.
3rd Month
70
CHANGES IN MOTHER: Gains weight(about 2-3
lbs.
3rd Month
71
CHANGES IN MOTHER: Some of the symptoms
from first 3 months
begin to be relieved.
4th Month
72
CHANGES IN MOTHER: Belly begins to be more
prominent.
4th Month
73
CHANGES IN MOTHER: Heartburns and
constipation.
4th Month
74
CHANGES IN MOTHER: Breast changes continue
● Increased blood flow
● Gains weight (3-4 lbs.)
4th Month
75
CHANGES IN MOTHER: Fetal movements
(quickening) are felt for
the first time. It may feel
like flutters or butterflies
in the stomach.
5th Month
76
CHANGES IN MOTHER: Shortness of breath may
improve.
5th Month
77
CHANGES IN MOTHER: Breasts may start
producing colostrum
—tiny drops of early
milk.
5th Month
78
CHANGES IN MOTHER: Some women have
Braxton-Hicks
contractions. They feel
like a painless squeezing
of the uterus or
abdomen. This is the
uterus’s way of
practicing for labor and
delivery. Braxton-Hicks
contractions are normal
and not a sign of
preterm labor.
5th Month
79
CHANGES IN MOTHER: Gains weight (3-4 lbs.)
5th Month
80
CHANGES IN MOTHER: Symptoms from 4 th and
5 th month continue
6th Month
81
CHANGES IN MOTHER: May experience
backache
6th Month
82
CHANGES IN MOTHER: Shortness of breath may
improve
6th Month
83
CHANGES IN MOTHER: Breasts may begin
forming colostrum
(Colostrom – tiny drops of
early milk)
6th Month
84
CHANGES IN MOTHER: Some women may
experience Braxton-Hicks
Contractions (False
Labor), as the uterus
prepares for labor and
delivery)(Normal, not a
sign of preterm delivery)
(Uterus prepares for labor
and delivery)
6th Month
85
CHANGES IN MOTHER: Weight gain of 3-4
pounds
● Movements of the fetus
may be felt
6th Month
86
CHANGES IN MOTHER: Symptoms from earlier
months continue
7th Month
87
CHANGES IN MOTHER: Fetus is highly active,
movements are felt
7th Month
88
CHANGES IN MOTHER: Ankles may swell from
standing
7th Month
89
CHANGES IN MOTHER: Back pain is common
7th Month
90
CHANGES IN MOTHER: Weight gain of 3-4
pounds
7th Month
91
CHANGES IN MOTHER: Uterus continues to
expand
7th Month
92
CHANGES IN MOTHER: Dizziness may lessen
7th Month
93
CHANGES IN MOTHER: Occasional headaches,
Backaches, Heartburn
8th Month
94
CHANGES IN MOTHER: Difficulty sleeping
8th Month
95
CHANGES IN MOTHER: Weight gain of 3-5
pounds
8th Month
96
CHANGES IN MOTHER: May experience difficulty
breathing, as the uterus
expands upward
8th Month
97
CHANGES IN MOTHER: May get varicose veins or
● hemorrhoids
● Constipation
● May get stretch marks
● Braxton-Hicks
contractions may
continue
8th Month
98
CHANGES IN MOTHER: May experience UI
(Urinary Incontinence)
due to pressure from the
uterus on the bladder
● Hair may appear fuller
and healthier due to
hormones
8th Month
99
CHANGES IN MOTHER: Uterus has descended
in lower abdomen
9th Month
100
CHANGES IN MOTHER: Difficulty holding urine
9th Month
101
CHANGES IN MOTHER: Varicose veins
● Stretch marks
● Ankle swelling
● Trouble sleeping
9th Month
102
CHANGES IN MOTHER: Shortness of breath
● Fatigue
● Weight gain of 3-5
pounds. Total: 20-29
pounds
9th Month
103
CHANGES IN MOTHER: Due to the descent of
the fetus into the lower
part of the uterus,
constipation and
heartburn may be
relieved
9th Month
104
CHANGES IN MOTHER: Most women give birth
around this time
10th Month
105
CHANGES IN MOTHER: By the end of the
pregnancy, the uterus has
expanded from the pelvis
to the bottom of the rib
cage
10th Month
106
CHANGES IN MOTHER: Shortness of breath,
heartburn, and
constipation usually
improve when fetus drops
10th Month
107
CHANGES IN MOTHER: Difficulty holding urine
10th Month
108
CHANGES IN MOTHER: ● Cervix begins to dilate,
may experience sharp
pains
● Afterbirth, placenta and
other tissues are expelled
10th Month
