for weeks a six-year old boy kept telling his first-grade teacher about the baby brother or sister...
TRANSCRIPT
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For weeks a six-year old boy kept telling his first-grade teacher about the baby brother or sister that was expected at his house. One day the mother allowed the boy to feel the movements of the unborn child. The six-year-old was obviously
impressed, but made no comment. Furthermore, he stopped telling his teacher about the impending event. The teacher finally asked, “Tommy, whatever has become of that baby
brother or sister you were expecting at home?” Tommy burst into tears and confessed, “I think
Mommy ate it!”
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FetalDevelopment
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The traveling egg…meets sperm=
FERTILIZATION
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Genetics
A. Chromosomes – Each cell in the body contains 46 identical chromosomes,
B. the only exception is the sperm and egg cells, which contain only 23
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Fertilization
Conception – Single sperm cell penetrates the ovum and new life begins
Fraternal twins – 2 different eggs and 2 different sperm
Identical twins – Fertilized egg splits = 2 individuals
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IDENTICAL TWINS
FRATERNAL TWINS
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Day 1:Ovulation and Fertilization:
– The birth of human life begins at fertilization.
– The sperm “swims upstream” 3 inches an hour
– The egg is 30,000 times larger than the sperm
– Sperm & egg meet form a single cell with 46 chromosomes
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First Trimester7-9 Days:
– Group of cells attach to uterine lining. Called an “EMBRYO”
18 Days– Heart muscle pulsates
20 Days– Nervous system : foundation
laid down
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First Trimester25 Days (One month)
– Heart beats regularly– Eyes & ears visible– Digestive system forms
6 weeks– Brain waves and body
movements are visible
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First Trimester8 weeks (2 months)
– All body parts are present: large head with brain & facial features; fingers & toes appear.
– Hiccups, kicks, waves– Now called a FETUS
10 weeks– All organs are functioning – stomach,
liver, brain– Swallows, sucks, yawns– 3 inches long
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Second Trimester16 weeks (3 ½ -4 months)
– Face clearer, first signs of gender appear. – Excretory system develops rapidly; skin develops– Hearing is fully developed– 6 ½ inches long– Mother can start to feel kicks, movement
20-24 weeks (5 months)– Growth rate slows– Open eyes, fine hair develops– Heart beat can be heard by stethoscope– Approx. 1 pound, 10 inches
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Second Trimester26 weeks (6 months)
– Earliest age of survival outside of mother’s uterus; 50% chance
– About 1 foot long– Outside sound or pressure can
increase the fetus’s heart rate– Growing and maturing
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Third Trimester28 weeks (6 ½ - 7 months)
– Fetus recognizes voices– Approx. 2 lbs 4 oz, 14 inches– Fully developed but not enough
fat cells to maintain body temp; incubator if prematurely born
– 80% chance of survival32 weeks (7 ½ - 8 months)
– Growing and maturing– 3 pounds 11 ounces
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Third Trimester37 weeks (8 ½ -9 months)
– Birth prior to this time is considered “pre-mature”
– 5 pounds 9 ounces40 weeks (9-10 months)
– Full term– Average : 7 lbs 6 oz, 20 inches
long
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Nutrition in Pregnancy
A. Eat from the 5 food group. You need more iron, calcium, vitamins, and minerals
B. A pregnant woman needs 200-300 extra calories a day
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Anatomy of PregnancyA. Uterus – “womb;” hollow muscular
organ that provides a home for the baby during pregnancy
B. Amniotic sac – “bag of water” a seal to protect the fetus from infection
C. Amniotic fluid- shock absorber, keeps temperature constant
D. Umbilical cord – life line, carries blood, oxygen, nutrients, and waste products between the fetus and placenta. About 2 feet long and contains 2 arteries and 1 vein
E. Placenta – picks up nutrients & oxygen from the mother’s blood & removes waste products from the baby; holds embryo to wall of uterus
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Placenta
Umbilical Cord
Vagina
UterusAmniotic fluidAmniotic SacCervix
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Labor and DeliveryA. Labor: Uterine muscles
contracts and relaxes causing cervix to dilate (8-12 hours)
1. Normal – 40 weeks after last period
2. Premature labor – 37 weeks or less
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STAGE 1: 2-24 hrs
Contractions cause the cervix to DILATE or widen from 2.5 cm-10 cm
Amniotic sac breaks which releases the amniotic fluid
(water breaks)
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STAGE 2 : ½ - 2 hrs
Continued contractions push baby out through the cervix & vagina (DELIVERY)
Umbilical cord clamped and cut
Baby’s nose and mouth suctioned to remove mucus
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STAGE 3 : Directly after baby delivery
Placenta delivery
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Labor and DeliveryDelivery: Best position of baby is
with head down1. Vaginal – Thru cervix down
the birth canalBreach – Buttocks first
2. Cesarean Section – Incision thru the mother’s abdomen
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Cesarean Section
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Why C-Section??
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UltrasoundDiagnostic technique that uses sound waves to
create pictures of internal body structures
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AmniocentesisDiagnostic technique that removes fetal cells from
amniotic fluid. WHY??• You or your partner has a genetic condition
which may be passed on to the baby. • There is a risk that the condition may be passed
on to the baby. • You have had a previous child affected by a
genetic condition. • You have had another type of test that is done
during pregnancy (such as an ultrasound or blood test). It has shown that there is an increased risk that your baby has a genetic condition.
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Physical Changes• Skip period/spotting• Tender enlarged breasts• Increased urination• Emotional• Heightened senses• Morning sickness• Cravings• Fatigue• Constipation• Uterus/abdomen expand (pushes on bladder/lungs)• Stretch marks/varicose veins• Weight gain
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Weight Breakdown:25-35 lbs is NORMAL!!
Blood = 3 lbsBreast tissue = 2 lbsUterus = 2 lbsBaby = 7.5 lbsPlacenta = 1.5 lbsAmniotic Fluid = 2 lbsFat = 7 lbsRetained H2o = 4 lbs