1. Menstrual Cycle, Spermatogenesis and Fertilzation
By: Jonathan and Armin

2. Anatomy

3. Menstrual Cycle
The cycle of changes in the female reproductive organs that prepares the body for pregnancy
Lasts 28 days
Controlled by hormones from the ovary
Ovary has ’s of follicles with an immature egg
Ovum has the female genetic information

5. Menstrual cycle Day 1-14
Day 1-7: several follicles start to grow and release estrogen
Day 7: all follicles degrade except one
Day 12: follicle releases estrogen to the blood. The pituitary in the brain releases Luteinizing hormone

6. Menstrual Cycle Ovulation
Ovulation: the release of a ripe ovum
Day 14: LH makes the follicle grow and the ovum is squeezed out
Fallopian tube surrounds ovum and moves it to the uterus
Lives for hours
If not fertilized, it dissolves and is shed with the uterus lining

7. Menstrual Cycle Day 15-28
Day 15-22:The ovum travels down the Fallopian tubes to the uterus
Day 23-28: If the egg is not fertilized, no estrogen of progesterone is produced
The thick lining in the uterus is not needed and is shed
The menstrual cycle starts again

8. Anatomy: Spermatogenesis

9. Spermatogenesis Sperm contains the male genetic information
Is called a male gamete
After 13 years of age, millions made daily
Testosterone made by testicles
Sperm form in the testicles
Spends 4-6 weeks developing in the epididymis
Moves to the vas deferens

10. Spermatogenesis
Seminal fluid is produced by the seminal vesicles and the prostate gland
Sperm are carried in the seminal fluid and move through the urethra during ejaculation
Each time up to 500 million sperm are released
Takes 70 days to mature

11. Fertilization
The joining together of the female ovum and the male sperm
Conception is when the sperm enters the ovum in the Fallopian tubes
Only one sperm can penetrate the ovum
The male and female gametes join to form a zygote

13. Fertilization The 2 cells divide to make 4
Keep dividing until the embryo is full grown
After 7 days, embryo implanted in the uterus
The menstrual cycle stops until a few weeks after birth

14. Fertilization

15. Bibliography
Hyde/DeLamater Understanding Human Sexuality McGraw-Hill Compamies