Human Development During Pregnancy

1
Human Development During Pregnancy
By Mrs. Fucoloros 7th Grade Science Class St.
Clement School St. Louis, MO 2005-2006
2
The First Trimester of Pregnancy
By Beth, Olivia, Jen, Abby, Catherine, Kate,
Sarah, Kate, Tim, Olivia, Ali, Taylor, Mary, and
Allie
3
Features
Week 4 The placenta develops Week 6 Umbilical
cord develops, first heart beat begins, buds for
arms and legs form Week 8 elbows and feet begin
to grow, teeth develop under gums
4
Features, continued
Week 9 Bones and cartilage begin to develop, the
fingers are short and webbed Week 10 Its
moving!!! Most joints have been formed Week 11
Now considered a fetus, blood begins to circulate
between the baby and the uterus, placenta starts
to function Week 12 Fingers and toes separate,
hair and nails begin to grow, genitals take on
gender characteristics
5
Organs

• Most of the organs like kidneys, liver, pancreas,
  bladder, intestines, bronchi, and skin have
  formed by the end of the first trimester

6
How Long?

• Week 7 baby is 1/3 of an inch long or the size
  of a grain of rice
• Week 12 baby is 2 inches long
• At the end of the first trimester the baby will
  weigh approximately half of a pound

7
Senses

• All sense organ have begun to form, but it will
  be many weeks before they are completed to the
  point where the baby will be able to use them

8
Extra Info

• Week 5 embryo has three layers the ectoderm,
  endoderm, and the mesoderm and the skin remains
  transparent
• Week 11 blood will begin to circulate in between
  the baby and the uterus
• Week 12 kidneys begin to form and excrete urine
  and the muscles in the intestinal wall practice
  digesting food
• During the first trimester the brain and head
  grow rapidly. Ridges demarcate the three
  sections of the brain. www. Visibleembryo.com
• Week 6 babys first heart beat is recorded

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TIMELINE
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Works Cited

• pregnancy week-by-week guide. 98-06. StorkNet
  family. 3 April 2006. http//www.pregnancygui
  deonline.com 
• The visible embryo not given. National
  Institute of Health. 3 April 2006
  http//www.visembryo.com/baby/index.html
• Fetal DevelopmentHow your baby grows.
  babycenter.com 2006.Baby Center LLC.30 March
  2006.http//www.babycenter.com/fetaldevelopment/
• First Trimester. Pregnancy week by-week guide.
  Doerr Consulting/Stork Net Family. 30 March
  2006.http//www.pregnancyguideonline.com/

11
2nd Trimester ( Weeks 13-27 )

• Sean, Drew, Nick, Eric, Brian, Patrick, Mary,
  Molly, William, Brendan, Rebecca, Claire and
  Colleen

12
Features

• The following begin to develop head-face, eyes,
  retina, eyelids and eyebrows, ears, bones in the
  middle ear, nostrils
• vocal cords, intestines, pancreases, arms, hands,
  fingernails, hair, legs, toenails, fat, placenta,
  brain, muscles.

13
Organs

• Week 17 Heart may be pumping up to 25 quarts of
  blood each day
• Week 18 Prostate glands grow in boys.
• Week 20 Uterus starts to develop in baby girls
• Week 21 Heart strengthens

14
Weight and Inches

• 4 months the babys length is 4.5 inches
• 5 months the babys length is 10 inches.
• 6 months the babys length is 12 inches and
  weighs more than a 1 pound

15
Developed Senses

• Eyes and ears develop and move to their proper
  position throughout the trimester
• Week 26 brain waves for sight and sound
• Week 27 eyes start opening and retinas start
  growing

16
Extra Info!

• Babys bones begin to harden
• Baby is moving a lot but the mother cannot always
  feel these movements
• The babys head is half the size of the body
• Fine hair is all over the babys body
• Babys eyes are large and opened

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TIMELINE
18
Work cited

• Web
• Pregnancy week-by-week. Doree Consulting
• Baby Center 4/3/2006, unknown
• http//www.pregnancyguideonline.com/
• Author unknown Visual Embryo Visual Embryo
  Timeline
• 4/3/2006 unknown
• http//www.visembryo.com/baby/index.html
• Baby center LLC. StorkNet Fetal Development How
  Baby Grows.
• 4/3/2006, unknown
• http//www.babycenter.com/fetaldevelopment/
• Images
• http//www.pregnancy.org/pregnancy/fetaldevelopmen
  t2.php
• http//nycpastor.typepad.com/photos/uncategorized/
  zaizaismile.jpg
• http//pregnancy.about.com/library/ultrasounds/us0
  016c.jpg

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Trimester 3

• By Michael, Justin, Jamey, Alex, Kevin, Tyler,
  Matthew, Chris, Maggie, David, Mary Margaret,
  Ellie, Anthony, Katie and Kevin

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Body Features

• The eyebrows and eyelashes finish forming and
  eyes function
• Hair on head continues to grow
• Leg actually starts to look like a leg, a little
  bony
• More body fat is collecting around bones
• The arms are small but the bones are growing

21
Organs

• During the third trimester of pregnancy almost
  all organs have formed
• Only the lungs need to be developed more because
  if the baby was born now it would have a hard
  time breathing
• By then end of the third trimester the baby is
  ready to be born because all essential organs are
  in place

lifedynamics.com
22
Length Weight

• The average weight from weeks 28-40 is 2 to 7.5
  lbs.
• The average length from weeks 28-40 is 14.8 to 20
  inches

23
SENSES

• By week 32, the baby is up to 4 pounds and all
  five sense are functional

24
EXTRA INFO

• In 2005 nearly 500,000 babies born before the 3
  trimester did not gain all their normal functions
• Albert Einstein was born in the beginning of the
  3 trimester
• 82 of twins weigh less than 6 pounds

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Timeline
Timeline
Timeline
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Bibliography

• 1. Baby Center. 1997-2006. What your baby
  looks like at seven months. 4/2/06
  www.babycenter.com/fedaldevelopment/
• 2. Visible Embryo. no copy right date. Visible
  Embryo. 4/2/06. www.visembryo.com/baby/index.html
  
• 3.Storknets. 1998-2006. Pregnancy
  Week-by- Week Guide. 4/2/06. www.pregnancyguideonl
  ine.com
• 4. Show Me News. no copy right date. Extra
  Information. www.showmenews.com/2005/babylove/2005
  .