Describes bodily changes of a male/female at pubertyWhen a Girl Becomes a Woman

Science V

ReviewExplain the process of fertilization

Motivation• What do you think will happen

to the egg when a sperm cell unites with it?

• What happens to the other sperm cells that do not unite with the egg?

Presentation• What do you think will happen

if the egg is not fertilized by any sperm cell?

• What is menstruation?

Group Activity• Form 5 groups.• Discuss as you work.• Be sure to record your

observations.• Watch the video clip: Process of

Menstruation in Women

Concept Formation• Discuss what happens to the

reproductive organ (uterus, ovary) of a female within a month.

• Define menstruation based on your experience.

• Enumerate the symptoms on menstruation.

Concept Formation

Concept FormationThe menstrual cycle involves the monthly changes in the female reproductive organs.

Concept FormationThe menstrual flow occurs when the egg is not fertilized by a sperm cell.

Concept FormationMenstruation lasts some four to five successive days once every 28-day cycle after the egg is released by the ovary.

Concept FormationAs long as female experiences menstruation, she can get pregnant.

Concept FormationMature egg leaves the ovaryEgg cell travels to the fallopian tubeUnfertilized egg does not attach to the uterusUterus lining breaks down

Evaluation1. What is the process where the egg cell mature? a. fertilization b. menstruation c. ovulation d. menoupausal

Evaluation2. What happens when a mature egg is not fertilized by a sperm? a. The egg is absorbed by the body. b. The egg is broken into pieces

(disintegrates) and is discharged as menstrual flow. c. The egg becomes mature and goes

out as a fertilized ovum. d. The egg goes back to the fallopian tube.

Evaluation3. Why is menstruation considered as a cycle? a. Because it occurs every month b. Because it goes round and round the uterus c. Because it enables a woman to become pregnant every year d. Because it enables a woman to experience menopause once a year

Evaluation4. How often do girls normally experience menstruation? a. once every week b. once every 30 days c. once every 29 days d. once every 28 days

Evaluation5. What occurs when an adult female no longer menstruates? a. pre-menstrual syndrome b. menopause c. pregnancy d. fertilization

AssignmentWhat are the effects of Menstruation?

AssignmentWhat are the effects of Menstruation?• Tenderness of the breasts• Bloating• Headache, Irritability, Nervousness,

Fatigue, Crying spells, Depression (also called PMS or Premenstrual Syndrome)

• Dysmenorrhea