Development of the baby occurs in three stages:•Zygote – fertilized egg in the fallopian tube

•Embryo- fertilized egg, planted in endometrium

•Fetus- fertilized egg at 7 weeks and beyond

Once a month and ovum is released• Ovum- A female egg

The egg moves through the fallopian tube to the uterus• Uterus-Where the baby

develops during pregnancy

If not fertilized it disintegrates and is flushed away with menstruation

If the ovum is in the fallopian tube at the same time a sperm is present- conception occurs

This union is what called a zygote!

Fertilized egg reaches the uterus and attaches itself to the uterus.

Cell multiplication begins

Internal organs and circulatory system begins to form.

Cell Division takes place and at the end of two weeks the zygote is the size of a pin-head

Heart begins to beat at 28 days

Small buds show the suggestions of arms and legs

4 Weeks

•Measures about ¼ inch long

•At this point, you cannot distinguish between an embryo of a pig, cow or human

•Suggestion of eyes

•Three parts of the brain are already formed

•Lungs and thyroid gland are developing

At 5 weeks the embryo is 1-1 1/2 inches long All major organ systems develop Amniotic Fluid surrounds the baby Face, and limbs take shape, arm buds and legs

buds

The placenta and umbilical cord are developing• placenta- the tissue that connects the sac

around the unborn baby to the mother’s uterus• umbilical cord- the tube that connects the

baby to the placenta, the purpose of this cord is to bring the baby nourishment and oxygen from the mother’s blood and takes away waste products

6 Weeks – Brain waves are evident

7 Weeks –Spine and nervous systemare forming

8 Weeks –Limbs are forming

The fetus is about 3 inch long

Nostrils, mouth, lips, teeth buds, and eyelids form

Fingers and toes are almost complete Eyelids are fused shut

Arms, legs, fingers, and toes have developed

All internal organs are present—but aren’t ready to function

The genital organs can be recognized as male or female

11 Weeks –•skin is evident•muscular development sufficient enough to open and close mouth•gender is detectable from the genitals•bone marrow makes blood cells

12 Weeks- •measures about 3 inches long•movement can be felt

Fetus is 8-10 inches long and weights 6 oz.

The fetus is covered with a layer of thick, downy hair called lanugo.

Heartbeat can be heard clearly. The fetus can swallow and hiccup.

Face has human features

Mother may feel movement at the end of this month

15 Weeks-•Can detect light and dark

16 Weeks –•Has eyebrows and eyelashes

18 Weeks – •Can open and close its mouth, swallow and can suck its thumb!

The fetus is about 12 inches long and weighs 1 pound.

A protective coating called vernix begins to form on baby's skin.

Hair eyelashes and eyebrows appear

Organs keep maturing

Fetus is very active, can move arms and legs freely

The eyes can open and close

The fetus has fingerprints and footprints

The fetus is 14 inches long and weighs – 1 ½ pounds

The baby's lungs are filled with amniotic fluid, and has started breathing motions.

The fetus may kick and cry

The baby can detect sound, talking and/or singing

Fat is starting to deposit under the skin

Fetus is 16 inches long and weighs about 2 pounds

Fetus is active and then rests.

The baby now uses the four senses of vision, hearing, taste and touch

Fetus can kick and cry

Hand can grip

The fetus is 16-17inches 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

•Weighs about 4 pounds

•Hair is growing

•Gaining about ½ pound of body weight per week

•Could be born at this stage and have a high survival rate

•Organs may be able to function on their own

Fetus is about 19-20 inches long and weighs 6-7 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

The last two systems to develop are the respiratory and digestive

What about twins? identical or fraternal?

What if the feet or buttocks are first in the birth canal?

Does it hurt when the umbilical cord is cut?

What makes an “innie or an outie” on your belly button?

What about the placenta?