1 / 98

Prenatal Development

Prenatal Development. Chapter 4-1 Child Development. Prenatal Development. How Conception Occurs Inner lining of uterus thickens Every 28 days, an ovum is released into fallopian tubes If a sperm fertilizes the egg while in the fallopian tube… CONCEPTION occurs. Prenatal Development.

tobias-gregory
Download Presentation

Prenatal Development

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Prenatal Development Chapter 4-1Child Development

  2. Prenatal Development • How Conception Occurs • Inner lining of uterus thickens • Every 28 days, an ovum is released into fallopian tubes • If a sperm fertilizes the egg while in the fallopian tube… • CONCEPTION occurs

  3. Prenatal Development • Time Frames • Ovum usually lives for 24-48 hours • Sperm is capable of fertilizing for 48 to 72 hours • During a woman’s cyle, there are 3-4 fertile days each month

  4. Fertilization of an Egg

  5. Real Life Pictures of Ovulation

  6. Prenatal Development • Germinal Stage • Lasts about two weeks • Cell division begins while still in the fallopian tube • After about 4 days, zygote reaches the uterus and implants • Zygote is the size of the head of a pin

  7. Prenatal Development • Embryonic Stage • Lasts from 3rd through 8th weeks • Embryo grows rapidly • Lots of changes occur

  8. Ultrasounds – 3 weeks, 8 weeks

  9. Prenatal Development • Organs and Body Systems Develop • Cells separate and turn in to major systems of body • Neural tube (becomes the brain/spinal cord) develops at 27 days after conception • Brain then takes over development • Very sensitive to drugs and alcohol

  10. Prenatal Development • Amniotic Sac • Sac filled with fluid forms around the embryo • Amniotic fluid protects the baby • Cushions the baby from bumps or falls • Embryo is about 1” long • Floats freely in fluid

  11. Prenatal Development • Placenta and Umbilical Cord • Placenta absorbs oxygen and nourishment from mother • Sends to baby through umbilical cord • takes carbon dioxide and other waste away • Placenta and umbilical cord provide everything baby needs until birth

  12. Prenatal Development • Umbilical cord • Thick and firm • Like a garden hose filled with water • Usually not flexible enough to loop around fetus

  13. Prenatal Development • Fetal Stage • From 8th week until birth • Baby is called “fetus” • Buds for 20 baby teeth appear • Vocal chords develop • Digestive system works • Spontaneous movements begin

  14. Prenatal Development • When can Baby live outside the womb? • At Month 7, with help • Baby gains weight • Adds fat • What does the fat do? • Helps keep Baby warm after birth

  15. Prenatal Development • What else is Baby up to? • Suck its thumb • Cough, sneeze, kick • Cry! • Still can change positions • As baby grows bigger • Baby runs out of room and assumes “fetal position” • Can no longer change positions

  16. 3 Weeks

  17. 8 Weeks

  18. Biology of Prenatal Development video • http://www.ehd.org/shoppingcart/products/The-Biology-of-Prenatal-Development.html • Ovulation video • http://www.youtube.com/watch?v=nLmg4wSHdxQ • Graphic Medical Photos of Cervix, Uterus, etc… • http://library.med.utah.edu/WebPath/FEMHTML/FEMIDX.html#2 • Nova Life’s Greatest Miracle • http://www.pbs.org/wgbh/nova/body/life-greatest-miracle.html • Nova’s Stem Cells • http://www.pbs.org/wgbh/nova/body/stem-cells-research.html

  19. Prenatal Development and Fruit Child DevelopmentSource: BabyCenter.com

  20. 4 Weeks • 4 Weeks: Baby -- now officially an embryo -- is about the size of a poppy seed.

  21. 5 Weeks • 5 weeks: Baby has grown to the size of a sesame seed, looking more like a tiny tadpole than a human.

  22. 6 Weeks • 6 weeks: Baby is as long as a lentil (about 1/4 inch).

  23. 7 Weeks • 7 weeks: Baby, having doubled in size since last week, is as big as a blueberry (about 1/2 inch in length).

  24. 8 Weeks • 8 weeks: Baby -- now comparable to the size of a kidney bean (just over 1/2 inch long) -- is constantly moving and shifting.

  25. 9 Weeks • 9 weeks: Baby has grown to the size of a grape, weighs a fraction of an ounce, and is almost 1 inch long.

  26. 10 Weeks • 10 weeks: Baby, now barely the size of a kumquat, weighs less than a quarter of an ounce. (Length: a little over 1 inch, head to bottom.)

  27. 11 Weeks • 11 Weeks- Baby is now about as big as a fig. (Length: just over 1 1/2 inches, head to bottom.)

  28. 12 Weeks • 12 weeks: Baby is, by this time, the size of a lime and weighs 1/2 ounce. (Length: just over 2 inches, head to bottom.)

  29. 13 Weeks • 13 weeks: Baby has reached the size of a medium shrimp and weighs nearly an ounce. (Length: almost 3 inches, head to bottom.)

  30. 14 Weeks • 14 weeks: Baby, now as long as a lemon, weighs about 1 1/2 ounces. (Length: 3 1/2 inches, head to bottom.)

  31. 15 Weeks • 15 weeks: Baby has grown to the size of an apple and weighs about 2 1/2 ounces. (Length: 4 inches, head to bottom.)

  32. 16 Weeks • 16 weeks: Baby measures up to an avocado, now, and weighs 3 1/2 ounces. (Length: 4 1/2 inches, head to bottom.)

  33. 17 Weeks • 17 weeks: Baby weighs 5 ounces this week -- about as much as a turnip. (Length: 5 inches, head to bottom.)

  34. 18 Weeks • 18 weeks: Baby is as big as a bell pepper and weighs almost 7 ounces. (Length: 5 1/2 inches, head to bottom.)

  35. 19 Weeks • 19 weeks: Baby equals a large heirloom tomato in size and weighs 8 1/2 ounces. (length: 6 inches, head to bottom)

  36. 20 Weeks • 20 weeks: Baby has grown as big as a banana. (Length: about 6 1/2 inches from head to bottom, and 10 inches from head to heel.)

  37. 21 Weeks • 21 weeks: Baby -- currently the length of a carrot -- weighs about 3/4 of a pound. (Length: 10 1/2 inches, head to heel.)

  38. 22 Weeks • 22 weeks: Baby has stretched to the size of a spaghetti squash and weighs almost a pound. (Length: nearly 11 inches.)

  39. 23 Weeks • 23 weeks: Baby weighs about as much as a large mango -- just over a pound. (Length: more than 11 inches.)

  40. 24 Weeks • 24 weeks: Baby is the size of an ear of corn and has caught up with an ear of corn in size and gained about 1/4 pound since last week. (Length: almost a foot.)

  41. 25 Weeks • 25 weeks: Baby is the size of a rutabaga and rivals the average rutabaga in weight -- about 1 1/2 pounds. (Length: 13 1/2 inches, head to heel.)

  42. 26 Weeks • 26 Weeks- Baby is as tall as an English hothouse cucumber and weighs about 1 2/3 pounds. (Length: 14 inches, head to heel.)

  43. 27 Weeks • 27 weeks: Baby is the size of a hefty as a head of cauliflower, weighing in at almost 2 pounds. (Length: about 14 1/2 inches.)

  44. 28 Weeks • 28 weeks: Baby is equal in weight to a Chinese cabbage -- about 2 1/4 pounds. (Length: almost 15 inches, from head to heel.)

More Related