Reflection #1 (Term 2) Book:

The Little Mouse, The Red Ripe Strawberry, and THE BIG HUNGRY BEAR

By Don and Audrey Wood Illustrated by Don Wood

Pre-Natal Development

BABY

Zygote EmbryoFetus

Prenatal Baby Development Development of the baby during the

period before birth.

Development in three stages Zygote—first 2 weeks of pregnancy Embryo—3rd-8th week of development Fetus—8th week till delivery

How is Prenatal Development Measured? Prenatal Period lasts 40 weeks

Is measured from the last menstrual period

Broken up into 3 trimesters Each trimester is about 13 weeks, or 3 months

First Trimester

Weeks 1-13, Months 1-3

Month 1—The Zygote Weeks 1-2

Finishing menstrual cycle

  Weeks 3-4

Fertilization/conception Egg travels to uterus (womb) Implantation—this is when pregnancy

technically begins

The Zygote—Month 1 Cell multiplication begins Internal organs and circulatory system

begins to form. At the end of two weeks the zygote is the

size of a pin-head Heart begins to beat

3 weeks & 1 day after fertilization Small bumps show the beginnings of arms

and legs

Parts of the Zygote

4 Weeks

The Embryo—Month 2

At 5 weeks the embryo is ¼ inch long All major organ systems develop Face and limbs take shape

Month 2 Webbed fingers and toes develop

7 weeks 8 weeks

The Embryo—Month 2

The placenta and Umbilical Cord develop Placenta- The tissue that connects the sac

around the unborn baby to the mother’s uterus Umbilical Cord- Tube that connects the baby

to the placenta Brings the baby nourishment and oxygen from the

mother’s blood Takes away waster products

Amniotic Sac Holds the amniotic fluid and surrounds the baby

Amniotic fluid Gaurds against jolts and keeps constant temperature

Two Months

Month 2 This is when signs and symptoms of

pregnancy usually become apparent

First trimester has the worst symptoms

Look Up Early Symptoms of Pregnancy

Web MD Pregnancy App

Signs & Symptoms of Pregnancy 1. Missed menstrual period  2. Fuller and more tender breasts  3. Nausea or morning sickness 4. Fatigue 5. Sensitivity to particular odors 6.Increased urination 7. Moodiness

The Fetus—Month 3 The fetus is about 1 inch long Nostrils, mouth, lips, teeth buds, and eyelids

form Eyelids are fused shut Arms, legs, fingers, and toes have developed All internal organs are present—but aren’t

ready to function

3 Months

Fingers & toes no longer webbed

11 Weeks

12 Weeks

The Fetus—Month 3 The genital organs can be recognized as male

or female Can tell as early as 12 weeks Most doctors give the ultrasound at 18-20 weeks

Summary of First Trimester The most critical and greatest time of risk and

vulnerability for birth defects depending on what the mother does or does not do during the pregnancy i.e.: taking drugs/medication.

Signs and symptoms of pregnancy are more likely to occur.

The majority of the physical development occurs (every physical feature and vital organs form, heart beats and brain waves begin etc.)

There is small maternal weight gain.

STOP HERE FOR DAY 1

The Fetus—Month 4 Fetus is 3 inches long and weights 5 oz. Your baby is covered with a layer of thick,

downy hair called lanugo. His heartbeat can be heard clearly. This may be when you feel your baby's first

kick. The baby can such thumb, swallow and hiccup.

4 months

15 Weeks

16 Weeks

18 Weeks

The Fetus—Month 5 The Fetus is about 6 inches long and

weighs 4-5 oz. A protective coating called vernix begins

to form on baby's skin. Hair eyelashes and eyebrows appear Organs keep maturing Fetus is very active The eyes can open and blink

Smallest baby in the world born At just 22 weeks

She was 10 OUNCES when born and 9.5 inches. That's just longer than the length of your hand. She weighed less than a can of soda!

Her little feet

The Fetus—Month 6 The fetus is 8-10 inches long and weighs

4-5 oz. Your baby's lungs are filled with amniotic

fluid, and he has started breathing motions.

If you talk or sing, he can hear you. Fat is starting to deposit under the skin

6 Months

The Fetus—Month 7 Fetus is 10-12 inches long and weighs

about 1-2 pounds. Fetus is active and then rests. The baby now uses the four senses of

vision, hearing, taste and touch

Seven Months

The Fetus—Month 8 The fetus is 14-16 inches long and weighs

2-3 pounds Layers of fat are piling on. Fetus has probably turned head-down in

preparation for birth. Fetus may react to noises with a jerking

action

Eight Month

The Fetus—Month 9 Fetus is about 17-18 inches long and

weighs 5-6 pounds Skin is smooth because of the fat Baby’s movement slows down due to lack

of room “Lightening” occurs when the baby drops

in the pelvis Disease fighting antibodies are taken from

the mother’s blood