Year 7 · Science · Reproduction · Lesson 2

Fertilisation, pregnancy and birth

Fertilisation, implantation, embryo and fetus, the placenta, umbilical cord and amniotic fluid, gestation, and how smoking and alcohol can harm a developing baby.

16-minute video lesson

Teaching, worked examples and 20 practice questions solved step by step.

Watch free for a month

What your child will learn

Describe fertilisation and implantation
Explain the role of the placenta
State the length of gestation
Explain how some substances harm a fetus

The method

Fertilisation.
Implantation.
Placenta + cord.
Birth.

Key words: fertilisation, embryo, fetus, placenta, umbilical cord, gestation.

Worked examples

The first three practice questions from the lesson, with every step.

Question 1

What is formed when sperm and egg nuclei join?

Step 1: Fertilised

Answer: a fertilised egg (then embryo)

Question 2

Where does fertilisation happen?

Step 1: Tube

Answer: the oviduct

Question 3

What is an embryo?

Step 1: Early

Answer: a ball of cells formed after fertilisation