Human Development
Name:
Study Guide: Prenatal Development
Chapter 5: Lesson 1 (pp.116 -123)
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Focus Questions (key concepts are underlined)
What are the stages of prenatal development?
How does the prenatal development process begin?
What organ’s or anatomy features are related to the conception process?
What changes do the fetus and mother undergo throughout pregnancy?
What Does It Mean? What Does It Matter?
As you read, fill in a definition for each term, concept, or idea. Then, briefly explain how it relates to one of the
focus questions. Use one or more of the underlined "key concepts" to explain how it matters.
What Does It Mean
Ovum
What Does It Matter
Ovum is released during menstruation of the
mother.
Ovulation
Phase of a female’s menstrual cycle when an egg
is released from the ovaries
Uterus
Fallopian Tube
Journey from ovary to uterus takes 2-3 days.
When ovum reaches uterus and is not fertilized it
disintegrates and leaves the women’s body.
Sperm
Conception
The process when a sperm penetrates and
fertilizes the ovum (egg).
• This process is the beginning of pregnancy.
• This would be the very beginning of prenatal
development.
• Ovum can live 12-24 hours while sperm is
capable of fertilizing an ovum for 48-72
hours.
Prenatal Development
It is broken down into three stages: germinal,
embryonic, and fetal. The developing fetus
Human Development
Name:
reaches essential milestones at each level that
contributes to its prenatal development. Outside
factors could influence development.
Zygote
Implantation
This is when the zygote attaches itself to the
lining of the uterus.
Embryonic Stage
Embryo
Organs and Body Systems
This is when the embryo’s heart, lungs, bones,
and muscles begin to form.
Neural tube is an important part and will form
brain and spinal cord
Amniotic Sac
Placenta
Formed from special layers of cells in the uterus
that are rich in blood vessels and attached to the
wall of the uterus
Umbilical Cord
Human Development
Name:
Fetal Stage
Making Movements
During 4th or 5th month- kicks and other
movements of the fetus touch the walls of the
uterus.
Completing Development
Staying Active
Growing Bigger
Pregnancy Development Month by Month
(chart p. 145-147)
First Trimester
Second Trimester
Appetite increases
Enlarged abdomen becomes apparent
fetal movements felt
Developing fetus can still move positions even
though it is crowded.
There is no longer room for the developing fetus
so it curls up inside the uterus known as the fetal
position.
Human Development
Third Trimester
Name:
The fetuses large size can cause backache, leg
cramps, shortness of breath and fatigue. The
fetal movements may also disrupt the mothers
sleep