Human Development During Pregnancy By Mrs. Fucoloro’s 7 th Grade Science Class St. Clement School St. Louis, MO

The First Trimester of Pregnancy By: Beth, Olivia, Jen, Abby, Catherine, Kate, Sarah, Kate, Tim, Olivia, Ali, Taylor, Mary, and Allie

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

Week 9: Bones and cartilage begin to develop, the fingers are short and webbed Week 10: It’s 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 Features, continued

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

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

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

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: baby’s first heart beat is recorded

TIMELINE

Works Cited “pregnancy week-by-week guide.” StorkNet family. 3 April “The visible embryo” not given. National Institute of Health. 3 April “Fetal Development:How your baby grows.” babycenter.com 2006.Baby Center LLC.30 March “First Trimester”. Pregnancy week by-week guide. Doerr Consulting/Stork Net Family. 30 March

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

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.

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

Weight and Inches 4 months: the baby’s length is 4.5 inches 5 months: the baby’s length is 10 inches. 6 months: the baby’s length is 12 inches and weighs more than a 1 pound

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

Extra Info! Baby’s bones begin to harden Baby is moving a lot but the mother cannot always feel these movements The baby’s head is half the size of the body Fine hair is all over the baby’s body Baby’s eyes are large and opened

TIMELINE

Work cited Web “Pregnancy week-by-week.” Doree Consulting Baby Center 4/3/2006, unknown Author unknown Visual Embryo “Visual Embryo Timeline” 4/3/2006 unknown Baby center LLC. StorkNet “Fetal Development: How Baby Grows.” 4/3/2006, unknown Images

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

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

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

Length & Weight The average weight from weeks is 2 to 7.5 lbs. The average length from weeks is 14.8 to 20 inches

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

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

Timeline

Bibliography 1. “Baby Center.” “What your baby looks like at seven months.” 4/2/ “Visible Embryo.” no copy right date. Visible Embryo. 4/2/ “Storknet’s.” Pregnancy Week- by-Week Guide. 4/2/ “Show Me News.” no copy right date. Extra Information