1. Pregnancy Weeks 1-6

2. Pregnancy test  Home pregnancy test  Schedule a appointment for a blood test with your doctor to confirm 100%

3. Symptoms  Missed period  Morning sickness or all day nausea  Frequent urination  Tiredness  Tender breasts  Bloating  Irritability and mood swings

4. Fertilization  Several million sperm released  Less than 10% make it to cervix  1-2000 enter fallopian tube  1-200 find egg

5.  1 fertilizes the egg – happens in fallopian tube  Sperm releases an enzyme(acrosome) to penetrate egg covering. Inside, it loses tail and the 2 nuclei combine to form the zygote(fertilized egg with 46 chromosomes  Once a sperm enters, the egg hardens and does not allow another sperm to enter

6. Twins  Identical – zygote divides within 2 days  Fraternal – 2 eggs are fertilized

7. Zygote and Blastocyst Zygote – 0-5 days - when sperm meets egg -1 cell and begins dividing Blastocyst – 3-7 days - a ball of cells with an inner and outer shell – inner becomes embryo, outer becomes placenta

8. Embryo and Fetus Embryo – 1-8 weeks – all body parts develop Fetus – 8 weeks to delivery

9. Germ Layers of early Embryonic Development  Ectoderm - produces the brain and integumentary system. Also the lining of the mouth, salivary glands, nasal passageways, and anus. Plus the skull, teeth, and endocrine system

10. Inner layers  Mesoderm becomes the muscular, skeletal, cardiovascular, and lymphatic systems, the kidneys and portions of the urinary tract, the gonads and most of the reproductive tracts and parts of endocrine  Endoderm - most of the digestive system, the exocrine glands, and the liver and pancreas. Most of the respiratory system, and portions of the urinary and reproductive systems (gametes). Portions of the endocrine system

11. Development  Implantation to uterus  1 week after fertilization – baby is size of the head of a pin  Umbilical cord and placenta develop  Placenta – organ that connects fetus to womb for nutrient uptake, waste removal and gas exchange  Umbilical cord – connects fetus to placenta  Amniotic sac begins to form  fluid filled sac for protection of developing baby

12. 4 weeks -  Spinal cord is developing  200 cells in 3 layers  Endoderm– internal organs  Mesoderm – bones, circulatory, kidney, muscles, reproductive  Ectoderm– skin, brain, nerves and hair  About the size of a dime

13. 5 weeks -  Eyes beginning to develop  Hand and foot plates forming  Head much larger than trunk  Heart begins to beat

14. 6 weeks -  Arm and leg buds forming  Heart and liver developing  Brain activity can be monitored  Oral and nasal cavities beginning to develop

15. 6 weeks - Mom  May have increased sensitivity to smell  More serious morning sickness  Get lots of rest  Eat regularly  Grapes  Keep food by bed for am  Weight gain  Headaches

16. Health and nutrition  Begin taking prenatal vitamins  Drink lots of water  Keep a healthy diet  Avoid alcohol, tobacco and caffeine  Medication – pain relievers and cough medicine  Painting  Cat litter