Lesson Notes By Weeks and Term - Junior Secondary 1

TERM – 3^RD TERM

WEEK TWO

Class: Junior Secondary School 1

Age: 12 years

Duration: 40 minutes of 5 periods each

Date:

Subject: BASIC SCIENCE

Topic: HUMAN REPRODUCTION –II

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

1. Define pregnancy
2. Identify symptoms of pregnancy and where to get help
3. Describe the growth of the foetus(Stages,from Growth to Birth)

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures,

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

NOTE

HUMAN REPRODUCTION –II

Pregnancy

Pregnancy is the physiological process in which a fertilized egg implants itself in the lining of the uterus and develops into an embryo, eventually leading to the birth of a baby. The process typically lasts around 40 weeks, divided into three trimesters. During pregnancy, the female body undergoes numerous changes to support the growth and development of the fetus, including hormonal fluctuations, physical changes, and adaptations in various organ systems.

Symptoms of pregnancy

 Some common symptoms of pregnancy include missed periods, nausea or vomiting (often referred to as morning sickness), breast tenderness, frequent urination, fatigue, and increased sensitivity to smells. However, it's important to note that these symptoms can vary greatly from woman to woman, and some may experience few or no symptoms at all. If you suspect you may be pregnant, it's best to take a pregnancy test and consult with a healthcare professional for confirmation and guidance.

Growth of the Foetus (Stages from Growth to Birth)

The growth of the fetus from conception to birth is divided into three main stages called trimesters:

1. First Trimester (Week 1 to Week 12):

   - Conception occurs, and the fertilized egg implants itself in the uterine lining.

   - By the end of the first month, the embryo's major organs begin to form, including the brain, spinal cord, heart, and gastrointestinal tract.

   - At around 8 weeks, the embryo is referred to as a fetus, and basic facial features, limbs, and internal organs continue to develop.

   - By the end of the first trimester, the fetus is about the size of a plum, and most of the major organs are formed, although they are not fully developed.

2. Second Trimester (Week 13 to Week 26):

   - During this period, the fetus experiences rapid growth and development.

   - By around 16 weeks, the fetus's sex can usually be determined, and movements may be felt by the mother.

   - By the end of the second trimester, the fetus has grown significantly, with fully formed limbs, facial features, and organs.

   - The fetus's skin becomes covered in vernix, a waxy substance that protects the delicate skin from amniotic fluid.

3. Third Trimester (Week 27 to Birth):

   - During the final trimester, the fetus continues to grow and mature in preparation for birth.

   - The fetus becomes more active, with increased movements felt by the mother.

   - The lungs continue to develop, and the fetus begins to practice breathing movements.

   - By the end of the third trimester, the fetus is fully developed and ready for birth. However, it may continue to gain weight and mature until delivery.

   - The average length of pregnancy is around 40 weeks, but full-term pregnancy can range from 37 to 42 weeks..

EVALUATION: 1. What is pregnancy?

2. Mention 5 symptoms of pregnancy
3. Discuss briefly the three stages foetus growth from conception to delivery.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively