Baby's prenatal development

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Use this to create your prenatal development timeline

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  • Discuss ectopic pregnancy at greater length. (Refer to lesson plans.)
  • Baby's prenatal development

    1. 1. Prenatal Development
    2. 2. Directions Read through this Powerpoint and compare to your prenatal webquest you completed last week. Use both resources to compile a prenatal development timeline for the baby*we will add what mom goes through later
    3. 3. The Three Stages of evelopment Zygote – Conception through Implantation • Implantation occurs approximately 2 weeks after conception Embryo – Implantation through the 8th week Fetus – 9th week through Birth
    4. 4. The 1st TrimesterMonths 1-3Weeks 1-13
    5. 5. Week 3 - Conception Conception is the moment when the sperm and egg unite. This begins the zygote stage. – Conception thru implantation Now there is an increased risk for an ectopic pregnancy.
    6. 6. Week 4 There are three layers to your baby – ectoderm, mesoderm, and endoderm – These layers will form the baby’s organs & tissues – Arm and leg buds begin developing, but are not clearly distinguishable. The placenta has also begun to form and is producing important hormones including hCG. There is movement of rudimentary blood through the main vessels.
    7. 7. 4 Weeks
    8. 8. The Heartbeat A fetus’sheart begins to beat 21 days after conception. Normal range of a fetal heartbeat is 120-160 beats per minute. http://www.gravityteen.com/prenatal/ninem
    9. 9. Week 5 Baby looks more like a tadpole – Their heart is beating steadily – Eyes and ears are beginning to form – Skeleton is forming – They are 1/4 inch long
    10. 10. 5 Weeks
    11. 11. Week 6 Baby – Lungs, nose and jaw are beginning to form. – Hands and feet have web like structures that will become fingers and toes. – 1/2 inch long.
    12. 12. 6 Weeks
    13. 13. Week 7 Essential organs are forming. Hair follicles, eyelids and tongue are forming. Elbows and toes are more visible. Approximately 3/4 of an inch long and weighing less than an aspirin.
    14. 14. 7 Weeks
    15. 15. Week 8 Baby: – Everything that is present in an adult human is present in the embryo. – Gender has been determined, but external genitalia cannot be seen. • “indifferent penis” – Brain takes control of body systems.
    16. 16.  The amniotic sac filled with fluid forms around the baby Amniotic fluid protects the embryo and cushions it from any falls or bumps mom may have The placenta develops – The placenta is full of blood vessels that carry food and oxygen to the baby through the umbilical cord.
    17. 17. Umbilical Cord Brings nourishment to the baby and takes waste away It is firm – like a garden hose full of water Generally not flexible enough to loop around the fetus, but may occur
    18. 18. End of Month Two
    19. 19. Week 9 Eyelids are fused shut and will stay that way until week 28. All joints are working – knees, elbows, etc. Baby can make a fist and suck their thumb. Baby is about the size of a grape.
    20. 20. Week 10 Baby can squint, swallow, and frown. Fingernails, toenails, and hair become visible this week. Baby is actively swallowing amniotic fluid. Baby is about the size of a lime.
    21. 21. Week 11 Baby begins to urinate Baby can smile Bones are beginning to harden. Baby is very active even though you can’t feel them yet.
    22. 22. Week 12 Baby can kick, curl and fan their toes, make a fist, move their thumbs, bend their wrists, turn their head, open their mouth and press their lips together. Baby practices breathing. The spinal column becomes bony. Baby is 3 inches long and weighs 1 ounce.
    23. 23. 12 Weeks
    24. 24. Week 13 Your facial expressions start to resemble your parents. Your movements are graceful and reflexes vigorous. Vocal chords are formed, but without air, you cant yet cry. Sex organs are apparent.
    25. 25. End of Month Three
    26. 26. End of the 1st Trimester
    27. 27. 2nd TrimesterMonths 3-6Weeks 14-26
    28. 28. Week 14 Babies heart pumps several quarts of blood. Fine hair has grows on their head. Nails are well formed. The growth of the head slows down and the rest of their body catches up. The neck is formed. Legs and arms lengthen. Baby is 4 inches long and weighs less than 2 ounces.
    29. 29. Week 15 Baby – 5 inches long and weighs 2 ounces. – Ears are beginning to look normal – Eyes are moving to the front of the head
    30. 30. Week 16 Baby – 6 inches long and weighs 2 1/2 ounces. – Head, neck and spine curve to follow the circular space of the uterus. Baby now occupies all the room in Moms pelvis. – The first thin transparent layer of skin begins to replace the temporary protective membrane. – Their eyes are still closed and the nose, eyes and lips and ears are shaping up. – The sex is discernible on ultrasound.
    31. 31. Week 17 Baby – 6.5 inches long and weighing 4 ounces – Sense of hearing is fully developed – Fat tissue is forming • Regulates body temperature and metabolism
    32. 32. Week 18 Baby – 7 inches long and 5.5 ounces – Protective coating is forming around baby’s nerves
    33. 33. Week 19 Baby – 7.5 inches long and weighs 7 ounces – Hair is beginning to grow – If you are having a girl, she already has 6 million eggs formed in her ovaries.
    34. 34. Week 20 – The Halfway Point Baby is about 8 inches long and weigh about 9 ounces. Baby can pedal their legs, make crawling movements, roll over, turn somersaults and swim. Covered with vernix which helps protect their skin.
    35. 35. Week 21 Baby – 8.5 inches long and 12 ounces – Actively swallowing amniotic fluid
    36. 36. Week 22 9 inches long and 14 ounces. Taken on the form of a tiny newborn. Now you can lift your eyes to eye level and turn them slowly from side to side for long periods of time. Your eyes can also dart quickly back and forth, sometimes smoothly, sometimes jerkily.
    37. 37. Week 23 Baby – Finally 1 pound and 10 inches long
    38. 38. Week 24 Baby – Brain is growing rapidly – Taste buds are forming – Lungs are developing • Produce surfactant which allows the air sacs to inflate easily
    39. 39. Week 25 Baby – Oil and sweat glands are functioning. – Baby can open their eyes when the eyelids become unsealed. They scan the darkness and may blink if there is a sudden noise. – They drink the amniotic fluid and could survive outside the womb if born early. – www.gravityteen.com/prenatal/ninemonths.cfm • Month 6
    40. 40. Week 26 Baby – 13 inches long and 2 pounds – Development may seem insignificant at this point, but baby is maturing to survive in the world
    41. 41. End of 2nd Trimester
    42. 42. 3rd TrimesterMonths 7-9Weeks 27-40
    43. 43. Week 27 Baby – 14 inches long and 2.25 pounds – Has a regular sleep cycle • Unfortunately it’s not the same as yours!
    44. 44. Week 28 Baby – 14.25 inches long and 2.5 pounds • Remember, baby gains the most weight in the last few weeks – Indentions start to form in baby’s brain – Eyebrows and eyelashes are visible
    45. 45. Week 29 Baby – 14.5 inches long and 2.75 pounds – Brain, muscles and lungs are maturing rapidly
    46. 46. Week 30 Baby – Using all four of your senses: vision, hearing, taste and touch. – Recognize Moms voice. – There is still enough space to straighten out. – The amniotic fluid is reduced by half to allow you room to grow. – Gaining weight quickly and by the end of the seventh month may weigh 4 pounds.
    47. 47. Week 31 Baby – 15 inches long and 3.5 to 4 pounds
    48. 48. Week 32 Baby – Skeleton is formed but bones are still soft – 15 to 17 inches long and 4 to 4.5 pounds
    49. 49. Week 33 Baby – Bones are hardening except for the skull
    50. 50. Week 34 Baby – 15.5 to 17.5 inches long and 5 to 5.5 pounds – High survival rate if born at this point
    51. 51. Week 35 Baby – Skin is beginning to thicken with a layer of fat stored underneath for insulation and nourishment. – Antibodies are building up. – Developed taste buds seem to have given them a sweet tooth. – Responding to familiar noises such as Moms voice and music. – Will gain two more pounds this month.
    52. 52. Week 36 Baby – 16 - 19 inches long and 5.75 - 6.75 pounds – Lanugo and vernix are starting to disappear • Baby swallow this along with amniotic fluid to produce meconium, or baby’s first bowel – Should be in the head down position
    53. 53. Week 37 Baby – Considered full term – Should be head down • Breech birth happens for 1 in 25 births
    54. 54. Week 38 Baby – 17-20 inches long and 6.25 to 7.5 pounds – Usually born with brown or blue eyes • If the eyes are blue, they may change by the time baby is 9 months old
    55. 55. End of 3rd Trimester

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