Prenatal Development

Prenatal Development

1st Grade Summer Story

http://www.whattoexpect.com/pregnancy/week-by-week/landing-weeks.aspx

http://www.healthguru.com/http://www.babycenter.com/

Prenatal Development

From conception to

birth….the 40 week

miracle!!

Review

1. Ovulation has occurred in the female body. The egg is transported down the fallopian tube.

Fertilization takes place in the F_____. Only one S ____ may penetrate the O____. Conception has occurred! If more than one ovum is present, they may

both be Fer_____ and this will cause multiple births.

A fertilized ovum will implant itself in the U__________ and begin to develop.

Beginning of life!

Look Who’s talking

Congratulations! Your PregnantOnline Pregnancy Test Link

Headaches Sensitive to smells Frequent urination Tender, tingling, swollen breast

Spotting Fatigue Enlarging uterus and abdomen

Food cravings

Period stops Morning sickness Glowing Irritability

Putting on weight Mood swings Acne Dizzy

Signs and Symptoms of Pregnancy

Figuring your due date

Take the first day of your last period February 7th

Go back 3 months November 7th

Add 7 days November 14th

Give or take 2 weeks

Pre-Natal Development

Growth of the baby from conception to birth 40 weeks, 10 months, 280 days, 3 trimesters.

Very rapid: goes from the size of a pencil dot (one cell) to a 7 ½ pound (200 billion cells) in 9 months. 4 weeks = poppy seed, 5 weeks = grain of rice, 7 weeks

= blueberry, 14 weeks = apple, 15 weeks = orange, 39 weeks = watermelon

If this rate of growth continued past birth, the baby would weigh 160 lbs by its first birthday.

Paper people winners

3 Trimesters (about 13 weeks each)

• 1st Trimester – focus is on physical

development– Define ovum, sperm,

conception/fertilization– The greatest time of risk and

vulnerability for birth defects to the developing fetus.

• 2nd Trimester – Increased organ development – Define

• Quickening • Lanugo

– Physically the easiest on the Mom

• 3rd Trimester – Continues to grow and

practice using body and bodily functions

– Define • Vernix and • Lightening

– Physically the most demanding on Mom

Prenatal Terms

Belly People

Zygote (week 0-2)Embryo (weeks 3-8)

Fetus (weeks 9-40)

Station 2 Pregnancy House

Station 2 Month at a Time

Use this link to help you fill in this portion of your study guidehttp://www.whattoexpect.com/pregnancy/week-by-week/landing-weeks.aspx

Month 0

Begins 3 weeks after 1st day of last period Ovulation occurred and the egg/ovum was released Sperm (several hundred million) deposited into female’s body

and begins travel to find the egg in the fallopian tube. The sperm beats against the ovum membrane Sperm sheds its tail and burrows inside. 2 cells now become one and begin to quickly divide to form a

human being. Begins to travel down the fallopian tube and 5-7 days after

conception, the zygote implants itself into the endometrial lining

Human Egg with Coronal CellsThis image is of a purple human egg sitting on a pin. The egg is coated with the zona pellicuda, a glycoprotein that protects the egg but also helps to trap and bind sperm. Two coronal cells are attached to the zona pellicuda.

Sperm on the Surface of a Human Egg trying to fertilize an egg.

Human Zygote and SpermIt looks like the world at war, but it is actually five days after the fertilization of an egg, with some remaining sperm cells still sticking around. The embryo and sperm cell nuclei arestained purple while sperm tails are green. The blue areas are gap junctions, which form connections between the cells.

Colored Image of a 6 day old Human Zygote Implanting

First Month for Baby

Zygote travels into the uterus.

Rapid cell division. Embryo implants into

uterus. Heart begins to beat. Nervous system.

Month 1 Events for Baby

Embryo phase begins Days after conception: 9 – begins to take shape 17 – has blood cells 18 – occasional heart

pulsation 19 – eyes start to develop 20 – nervous system

foundation set 24 – vital organs begin

25 – heart beats regularly 28 – 40 pairs of muscles,

limb buds, trunk of body is formed

30 – develops ears and nose 31 – hand, arm, shoulder

region formed 33 – hand section formed Baby ¼” long (length of

rice)

4 Weeks

By the end of the First Month for Mom

Misses her period. Already 2 weeks

pregnant when she skips a period.

Changes in estrogen & progesterone levels.

Month 2 Events

▪Internal organs and neural system still forming

▪Blood is circulating

▪Still days after conception

40 days – body movements visible by ultrasound

42 days – skeleton complete

43 days – brain puts off electrical brain waves

49 days – has a miniature doll appearance

56 days – moves, squints, swallows, yawns, and tongue moves

▪Baby is 1.5” long

Second Month for Mom

Nausea/Vomitting (Morning Sickness)

Frequent urination Mood swings

Second Month for Baby

Head develops rapidly. Face, eyes, and ears

take shape. Internal organs Sex organs. Arm & leg buds. Nails are forming 1 inch 1/10 oz.

Nutrition for a Pregnant Woman - Link

http://www.mypyramid.gov/mypyramidmoms/index.html

Third Month for Mom

Continued nausea. Frequent urination. Cravings. Increased appetite.

Third Month for Baby

Head grows rapidly. Bone formation. Digestive organs

function. Arms, legs and fingers

move. 3 inches 1 oz.

End of the First Trimester

Time for mom to adjust to pregnancy.

Baby grows most rapidly.

All internal organs are complete.

Mom must be very careful with health.

Fourth Month for Mom

Body is adjusted to pregnancy.

Increased appetite. Gained 2-4 lbs. Clothes fitting snug.

Fourth Month for Baby

Bones harden. Actively moving. Lower parts of body

grow rapidly. Sex organs fully

formed. Heartbeat detected. 7 inches 5 oz.

Fifth Month for Mom

Mild back-aches. Size change is obvious

to others. Hears heart beat. Ultrasound. Feels movement. Gains 5-8 lbs.

Fifth Month for Baby

Lanugo hair. Vernix. Ears and nose develop

cartilage. Finger and toe nails. Can suck thumb,

hiccup, and kick. 12 inches 14 oz.

Sixth Month for Mom

Increased need for sleep.

Gained 10-12 lbs.

Sixth Month for Baby

Eyes and eyelids fully formed.

Fat developing under skin.

Practices breathing movements.

14 inches 2 pounds

End of Second Trimester

Baby continues to develop and grow.

Mom feels good. Easiest trimester for

mom and baby.

Seventh Month for Mom

Effects posture. Leg cramps. Back-aches. Waddling. Gains 12-15 pounds.

Seventh Month for Baby

Brain developing rapidly.

Inhales amniotic fluid to develop lungs.

Gaining lots of weight. 17 inches 3 pounds

Eighth Month for Mom

Heartburn. Difficulty breathing. Multiple small meals. Increased urination. Back, leg and muscle

aches. Gains 15-20 pounds.

Eighth Month for Baby

Fat is stored for later use.

Fingernails reach beyond fingertips.

Rapid growth. Sheds vernix & lanugo. 17 inches 5 pounds

Ninth Month for Mom

Baby drops into pelvis. Contractions. Gains 20-30 pounds. Gives birth!!!!

Ninth Month for Baby

Organ system fully functional.

Vernix covers entire body.

Settle into head-down position for birth.

21 inches 7 pounds

End of Third Trimester

Most difficult for mom.

Baby gains weight rapidly.

Both are ready for birth!

Welcome to the World!

Octo-Mom Birth Link