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Fetal Development

Total questions: 65

Worksheet time: 32mins

Name
Class
Date
1.

What structure protects and cushions the fetus throughout its prenatal development?

a)

amniotic sac and fluid

b)

placenta

c)

umbilical cord

d)

vagina

2.
When the blastocyst attaches to the lining of the uterus, this is known as
a)
fertilization
b)
ovulation
c)
implantation
d)
mitosis
3.
What is the "lifeline" between the fetus and the placenta?
a)
amniotic sac
b)
umbilical cord
c)
placenta
d)
vagina
4.
Following implantation, and until the 9th week of pregnancy, this would be called a(n)
a)
blastocyst
b)
zona
c)
embryo
d)
fetus
5.
In the embryo, heartbeat can first be heard at around 
a)
8 days
b)
3 weeks
c)
6 weeks
d)
12 weeks
6.
Twins can result from
a)
a fertilized egg dividing into two blastocysts
b)
two eggs being released at the same time, and both are fertilized
c)
two embryos implanted in the uterus through invitro fertilization
d)
all of these can result in twins
7.

A female egg that has been fertilized.

a)

Amniotic Sac

b)

Placenta

c)

Infant

d)

Zygote

8.

A membranous vascular organ that develops in female mammals during pregnancy, lining the uterine wall and partially enveloping the fetus, to which it is attached by the umbilical cord.

a)

Fetus Amniotic Sac

b)

Umbilical Cord

c)

Placenta

d)

Yolk

9.
Which system develops first in the embryo?  

a)
reproductive 
b)
circulatory 
c)
nervous 
d)
respiratory 
10.
Pregnancy is divided into three_________.
a)
Trimesters
b)
Periods
c)
Months
11.
Which is the correct order?
a)
embryo, fetus, zygote
b)
fetus, zygote, embryo
c)
embryo, zygote, fetus
d)
zygote, embryo, fetus
12.
What is the purpose of the placenta?
a)
It shields the baby from infection and toxins.
b)
It protects the baby from environmental factors that may cause harm.
c)
It protects the amniotic fluid.
13.
The umbilical cord connects the baby to placenta. 
a)
True 
b)
False
14.

Capable of producing all types of blood cells…can be used to treat many serious blood-related illnesses in the baby or other family members

a)

placenta

b)

stem cells

c)

antibodies

d)

hormones

15.
The union of a sperm and egg is called
a)
fertilization
b)
embryo
c)
implantation
d)
trimester
16.
What results when a fertilized egg implants in the fallopian tube or ovary?
a)
Preeclampsia
b)
Ectopic pregnancy
c)
Stillbirth
d)
Miscarriage
17.
What is a healthy amount of weight to gain during a pregnancy?
a)
50-60 pounds
b)
20-30 pounds
c)
12-20 pounds
d)
75 pounds
18.
Why is alcohol so harmful to a fetus?
a)
It's brain is developing, and it's liver can't filter out the alcohol.
b)
It tastes real bad
c)
Because it's too strong
d)
Because the fetus is under 21
19.
What happens when a fertilized egg splits into two?
a)
Fraternal twins
b)
Identical twins
c)
Nothing, you just have one baby. 
d)
Triplets
20.
What things DO NOT cause birth defects?
a)
Cocaine
b)
Alcohol
c)
Folic Acid in vitamins
d)
Exposure to ionizing radiation
21.

Which of the following structures in the human female reproductive system is correctly matched with its function?

a)

ovary - produces one mature egg cell each month

b)

uterus - serves as storage for immature eggs

c)

oviduct - serves as the location for blastocyst implantation

d)

cervix - provides a place for fertilization to occur

22.

This structure is used for both urination and reproductive functions.

a)

Urethra

b)

vas deferens

c)

Testis

d)

prostate gland

23.

A fertilized egg undergoes several stages before it is successfully implanted. The diagram below shows these stages as the fertilized egg travels through the female reproductive system. In which of the following structures of the female human reproductive system is the blastocyst implanted during normal human fertilization?

a)

ovary

b)

uterus

c)

vagina

d)

amniotic sac

24.
The drinking of alcoholic beverages by a pregnant woman is harmful to the development of her fetus. This is most damaging early in a pregnancy because during this time
a)
the lungs of the fetus become functional.
b)
alcohol can easily enter the mouth of the fetus.
c)
many of the essential organs of the fetus are forming.
d)
the fetus cannot excrete wastes.
25.

The cervix is

a)

a sac that holds the baby

b)

a white cheesy substance that a baby is covered with when it is born

c)

the tough ring of tissue that is closed during pregnancy to keep the fetus secure

26.

Chemicals in cigarettes poses little harm to the developing fetus

a)

true

b)

false

27.

The innermost layer of the blastocyst is the

a)

endoderm

b)

gastrula

c)

ectoderm

d)

mesoderm

28.

The middle layer of the blastocyst is the

a)

endoderm

b)

ectoderm

c)

mesoderm

d)

deuterostome

29.

The embryo layer that forms the skin and nervous tissue is the _____.

a)

endoderm

b)

mesoderm

c)

ectoderm

d)

deuterostome

30.

The digestive tract forms from the _______.

a)

endoderm

b)

mesoderm

c)

ecotoderm

d)

protostome

31.
The umbilical cord _____________________.
a)
assists when the amniotic fluid is removed from the mother to check for genetic disorders.
b)
shields the baby from infection and toxins.
c)
provides the baby with food and oxygen and removes waste products.
d)
provides protection for the baby.
32.
The developing embryo is fed by its mother’s blood through a tissue called the
a)
placenta
b)
vagina
c)
amnion
d)
uterus
33.
What is the first organ that begins to function in the developing embryo?
a)
the lungs
b)
the limbs
c)
the brain
d)
the heart
34.
Ordinarily, how many sperm fertilize a female’s egg?
a)
several million
b)
a few hundred
c)
one
d)
six to ten
35.

The heart of the fetus first begins to beat during

a)

Month3

b)

Month 2

c)

Month 4

d)

Month 1

36.
What structure protects and cushions the fetus throughout its prenatal development?
a)
amniotic sac and fluid
b)
placenta
c)
umbilical cord
d)
vagina
37.
The structure that manages the exchange of nutrients and wastes between fetus and mother is
a)
4
b)
5
c)
6
d)
7
38.
The birth canal is 
a)
1
b)
2
c)
3
d)
4
39.
The site of fertilization is
a)
1
b)
2
c)
3
d)
5
40.
The site of implantation is
a)
1
b)
2
c)
3
d)
4
41.
When an egg is not fertilized it
a)
returns to the ovary
b)
passes out of the woman's body unnoticed
c)
is absorbed in the abdomen
d)
leaves the woman's body in search of sperm
42.
Can suck thumb, swallow and move around
a)
Month 4 
b)
Month 5 
c)
Month 6
43.
Baby is about 14-16" long, gaining weight rapidly
a)
Month 6
b)
Month 7
c)
Month 8
44.
Face, eyes, ears & limbs take shape
Bones begin to form
a)
Month 3
b)
Month 2
c)
Month 4
45.
Moves into head down position
a)
Month 7
b)
Month 8
c)
Month 9
46.
Acquires disease fighting antibodies from mother's blood
Descends into the pelvis
Skin becomes smooth
a)
Month 7
b)
Month 8
c)
Month 9
47.
Hair, eyebrows, and eye lashes appear
Organs maturing
a)
Month 3
b)
Month 5
c)
Month 4
48.
Bones form
a)
Month 1
b)
Month 2
c)
Month 3
49.
Periods of activity followed by periods of quiet,
Weighs 1 1/2 -2 pounds
a)
Month 6
b)
Month 5
c)
Month 7
50.
Egg attaches to lining of uterus
Heart begins to beat
Spinal cord and brain begin development
a)
Month 1
b)
Month 2
51.
8" long, baby looks wrinkled
a)
Month 4
b)
Month 5
c)
Month 6
52.
All organs are present, but immature
a)
Month 3
b)
Month 2
53.
Month in which kicks can first be felt from a fetus...
a)
2
b)
3
c)
4
d)
5
54.
Month where a fetus can first swallow, hiccup, suck thumb.
a)
4
b)
5
c)
6
d)
7
55.
________ is waxy material on the skin that develop during month 7. 
a)
Merconuim
b)
Vernix
c)
Alabaster
d)
Mucous
56.
Why is is easier for the mother to breathe during the 9th month of pregnancy?
a)
She is relieved - it's almost time. 
b)
The baby has moved down, pressure off her diaphram
c)
Her bladder is empty
d)
She sits down a lot. 
57.
What month does the fetus first have a sleep/wake cycle? 
a)
5
b)
6
c)
7
d)
8
58.
Why does fat form under the baby's skin during month 6?
a)
so it is cuter when born
b)
to make it harder on the mom 
c)
to help with thermoregulation
d)
so clothes fit
59.
What structure does the fetus receive nutrition through?
a)
Mouth
b)
Veins
c)
Amniotic fluid
d)
Umbilical cord
60.
A trimester is _____.
a)
three days
b)
three weeks
c)
three months
61.
How many weeks is a normal pregnancy?
a)
35
b)
28
c)
40
d)
45
62.
During which Trimester do the bones begin to form?
a)
3
b)
2
c)
1
63.

Which prenatal test shows a video image of a baby and may detect birth defects?

a)

ultrasound

b)

amniocentesis

c)

alpha feto protein(AFP)

d)

chorionic villi sampling(CVS)

64.

What structure prevents the the mother's blood flow from intermingling with the embryo's blood flow ?

a)

amniotic sac

b)

umbilical cord

c)

placenta

d)

chorionic villi

65.

What hormone suppresses the breakdown of the corpus luteum during pregnancy?

a)

Gonadotrophrin releasing hormone

b)

Progesterone

c)

Estrogen

d)

Human chorionic gonadotrophin

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