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Chapter 4: Pregnancy p=9+months+of+gestation+in+20+seconds &n=21&ei=utf-8&js=1&fr=yfp-t- 501&fr2=tab- img&tnr=20&vid=000157394978.

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Presentation on theme: "Chapter 4: Pregnancy p=9+months+of+gestation+in+20+seconds &n=21&ei=utf-8&js=1&fr=yfp-t- 501&fr2=tab- img&tnr=20&vid=000157394978."— Presentation transcript:

1 Chapter 4: Pregnancy http://video.search.yahoo.com/video/play? p=9+months+of+gestation+in+20+seconds &n=21&ei=utf-8&js=1&fr=yfp-t- 501&fr2=tab- img&tnr=20&vid=000157394978 http://pregnancy.about.co m/cs/pregnancycalendar/l/ blpregcalc.htm

2 PRENATAL pre= before natal = of or relating to birth development of a baby during the period before birth 40 weeks

3 Reproductive Cells Male= sperm produced in the testes Male= sperm produced in the testes Female= egg or ovum produced in the ovaries Female= egg or ovum produced in the ovaries

4 Fallopian Tubes hollow tubes that extend from the right and left sides of the uterus hollow tubes that extend from the right and left sides of the uterus where fertilization takes place where fertilization takes place

5 Uterus (womb) Organ where the baby develops and is protected until birth Organ where the baby develops and is protected until birth The size of the uterus pre-pregnancy is about the size of a lemon.

6 Sperm live 1-5 days The egg has 24 hours to be fertilized

7 Conception The joining of the egg and the sperm The joining of the egg and the sperm This is when hereditary traits are determined! This is when hereditary traits are determined! also referred to as fertilization also referred to as fertilization

8 GERMINAL STAGE starts with conception first 2 weeks of pregnancy AMNION: fluid filled sac that surrounds the baby in the uterus Yolk Sac – provides nutrients before the placenta takes over

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10 Zygote This is formed when the egg and sperm unite This is formed when the egg and sperm unite Fertilized egg (germinal stage) Fertilized egg (germinal stage) First 2 weeks of pregnancy First 2 weeks of pregnancy A home pregnancy test will not yet give a + test result! http://www.babycenter.com/6_y our-pregnancy-2- weeks_6000.bc?intcmp=timeli ne

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12 Each Person: Has 46 chromosomes : 23 from MOM 23 from DAD

13 Sex Determination Determined at the moment of conception Determined at the moment of conception female= X male= X or Y female= X male= X or Y XX = girl XY= boy XX = girl XY= boy Who determines the sex of the baby?

14 Note What has already What has already formed? formed? Umbilical

15 EMBRYONIC STAGE 2 nd stage of prenatal development 2 nd stage of prenatal development Weeks 3-8 Weeks 3-8 most critical stage most critical stage all major organs begin to form all major organs begin to form baby now receives good and harmful substance from the mother (through the umbilical cord) baby now receives good and harmful substance from the mother (through the umbilical cord)

16 First Month (Weeks 5-8) By the end of the first month, the embryo is about 1/10 of an inch long. The heart, which is no larger than a poppy seed, has begun beating. By the end of the first month, the embryo is about 1/10 of an inch long. The heart, which is no larger than a poppy seed, has begun beating.

17 5 Weeks

18 First Month

19 Two Months (Weeks 9-12) The embryo is about ¼ inch long and has distinct, slightly webbed fingers. Veins are clearly visible. The heart has divided into right and left chambers. The embryo is about ¼ inch long and has distinct, slightly webbed fingers. Veins are clearly visible. The heart has divided into right and left chambers.

20 Two Months

21 Placenta: organ filled with blood vessels that nourishes the baby in the uterus Placenta: organ filled with blood vessels that nourishes the baby in the uterus Umbilical Cord: connects the baby to the placenta Umbilical Cord: connects the baby to the placenta nourishes baby, removes waste nourishes baby, removes waste

22 FETAL STAGE 9 th or 10 th week of pregnancy 9 th or 10 th week of pregnancy bone cells replace cartilage bone cells replace cartilage all parts of the body mature all parts of the body mature overall size quickly increases overall size quickly increases

23 Fetal Stage Can hear the heart beat around 9 weeks Can hear the heart beat around 9 weeks Quickening occurs: mother feels the baby move for the first time (4 th or 5 th month or 16 to 20 weeks) Quickening occurs: mother feels the baby move for the first time (4 th or 5 th month or 16 to 20 weeks) Age of viability: most babies could survive if they were born (around 28 Weeks) Age of viability: most babies could survive if they were born (around 28 Weeks) Highlights of this stage…

24 Three Months (Weeks 13-16) By now the fetus is 1 inch long and is fully formed. He has begun swallowing and kicking. All organs and muscles have formed and are beginning to function.

25 Four Months (Weeks 17-20) 3 long 3 long Your baby is covered with a layer of thick, downy hair called lanugo. His heartbeat can be heard clearly. This is when you may feel your baby's first kick. Your baby is covered with a layer of thick, downy hair called lanugo. His heartbeat can be heard clearly. This is when you may feel your baby's first kick.

26 4 months

27 Five Months (Weeks 21-24) A protective coating called vernix begins to form on baby's skin. By the end of this month, your baby will be about 7 inches long and weigh around ½ lb. A protective coating called vernix begins to form on baby's skin. By the end of this month, your baby will be about 7 inches long and weigh around ½ lb.

28 My name is Michael Clancy and I am the photojournalist that photographed Samuel Armas reaching from his mother's womb and reacting to the touch of his surgeon at twenty-one weeks in utero during a spina bifida corrective procedure in 1999." "Out of the corner of my eye I saw the uterus shake, but no one's hands were near it. It was shaking from within. Suddenly, an entire arm thrust out of the opening, then pulled back until just a little hand was showing. The doctor reached over and lifted the hand, which reacted and squeezed the doctor's finger. As if testing for strength, the doctor shook the tiny fist. Samuel held firm. I took the picture! Wow! It happened so fast that the nurse standing next to me asked, "What happened?" "The child reached out," I said. "Oh. They do that all the time," she responded."

29 Six Months (Weeks 25-28) Eyebrows and eyelids are visible. Your baby's lungs are filled with amniotic fluid, and he has started breathing motions. If you talk or sing, he can hear you. Eyebrows and eyelids are visible. Your baby's lungs are filled with amniotic fluid, and he has started breathing motions. If you talk or sing, he can hear you.

30 6 Months

31 Seven Months (Weeks 29-32) By the end of the seventh month, his body is well-formed. Fingernails cover his fingertips By the end of the seventh month, his body is well-formed. Fingernails cover his fingertips Mother may feel Braxton-Hicks contractions during this month Mother may feel Braxton-Hicks contractions during this month

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33 Eight Months (Weeks 33-36) Your baby is gaining about half a pound per week, and layers of fat are piling on. He has probably turned head-down in preparation for birth. He weighs around 3 – 4 pounds. Your baby is gaining about half a pound per week, and layers of fat are piling on. He has probably turned head-down in preparation for birth. He weighs around 3 – 4 pounds.

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35 Nine Months (Weeks 37-40) Your baby gains more weight this month and usually weighs between 7-9 lbs. and is 19 - 22 inches when he is born. As he becomes more crowded, you may feel him move around less. Your baby gains more weight this month and usually weighs between 7-9 lbs. and is 19 - 22 inches when he is born. As he becomes more crowded, you may feel him move around less. Antibodies are acquired Antibodies are acquired


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