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!”

FetalDevelopment

The traveling egg…meets sperm=

FERTILIZATION

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

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

IDENTICAL TWINS

FRATERNAL TWINS

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

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

First Trimester25 Days (One month)

– Heart beats regularly– Eyes & ears visible– Digestive system forms

6 weeks– Brain waves and body

movements are visible

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

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

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

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

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

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

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

Placenta

Umbilical Cord

Vagina

UterusAmniotic fluidAmniotic SacCervix

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

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)

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

STAGE 3 : Directly after baby delivery

Placenta delivery

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

Cesarean Section

Why C-Section??

UltrasoundDiagnostic technique that uses sound waves to

create pictures of internal body structures

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.

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

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