1. Joke of the Day:

2. Unit 11: Fertilization and Pregnancy

3. Fertilization Video

4. Fertilization Sperm: Male sex cell (Haploid)
Ovum: Female sex cell (Haploid)
Ovulation: Every 28 day…1 egg matures/released into Fallopian Tube, lives hrs, Occurs approx 2 weeks before next period (most fertile time)
Menstruation: Shedding of ovum and uterine lining if fertilization does not occur

5. Fertilization
Fertilization: Fusion of Sperm and Egg making a Zygote, Usually occurs in Fallopian Tube
Zygote: Fertilized egg (Diploid)

6. Fertilization
Question: Who does a female zygote receive chromosomes? +
Female - XX
Egg
Haploid
n=23
Male - XY
Sperm
Haploid
n=23
Female - XX
Zygote
Diploid
2n=46
Answer: Both Mother and Father

7. Pregnancy Definition:
The state of a woman carrying a fertilized egg. Time from conception to birth is usually 9 months

8. Pregnancy

9. Divided into 3 trimesters:

10. 1st Trimester (Weeks 1-12)

11. 1st Trimester - Mother
Major Hormonal Changes: (estrogen, progesterone)
Menstruation stops
Fatigue
Upset Stomach / Nausea
Tender Breasts

12. 1st Trimester Baby at 4 weeks Brain spinal cord, heart appear
Arm buds form (Baby is 1/25th of an inch)

13. 1st Trimester Baby at 8 weeks Heart begins to beat
Eyes move forward on head
Fingers and toes appear

14. 1st Trimester Baby at 12 weeks Nerves, muscles work together (fist)
Eyes close until 28th week
Sex organs appear

15. 2nd Trimester (Weeks 13-28)

16. 2nd Trimester - Mother Nausea goes away Weight gain
Feel baby move towards the end of trimester

17. 2nd Trimester Baby at 16 weeks Complex skeleton forms
Transparent skin forms
Reaches 4 to 5 inches. Weighs 3 ounces.

18. 2nd Trimester Baby at 20 weeks Baby becomes more active
Eyebrows, nails form
Baby can hear and swallow.

19. 2nd Trimester Baby at 24 weeks Bone marrow begins to make blood cells
Lungs form but don’t work
Baby wakes and sleeps regularly.

20. 3rd Trimester (Weeks 29-40)

21. 3rd Trimester - Mother Most weight gain Frequent urination
Swelling in feet, ankles

22. 3rd Trimester Baby at 32 weeks Bones are finished but soft
Eyes can open and close
“Practice” breathing movements occur

23. 3rd Trimester Baby at 36 weeks Baby’s body fat increases
Less space to move
16-19” long pounds

24. 3rd Trimester Baby at 37-40 weeks Organs are fully functional
baby turns “head down”
Birth occurs!

25. Stages of Pregnancy Video