L4 Menstrual cycle Starter What are the changes you expect in a girl at puberty ? When does puberty start ? What controls puberty ? Have you heard the word menstruation what does it mean to you ?

Lesson 4 – Menstrual cycle Learning objective : we will learn Why the menstrual cycle occurs The stages in the menstrual cycle

Learning outcomes: by the end of the lesson we will be able to: State what controls the menstrual cycle Describe the stages in the menstrual cycle.

The Female Reproductive System

Note H/W in your planner now Title ‘ write a story on the life of an unfertilised egg’

Ovulation and Fertilisation In the female one of the ovaries produces an egg every 28 days. This is called ovulation. http://www.bbc.co.uk/learningzone/clips/ovulation-in-humans/1845.html During sexual intercourse sperm is ejaculated into the vagina. If the sperm and egg meet the sperms nucleus will join with the eggs nucleus. This is called fertilisation. http://www.bbc.co.uk/learningzone/clips/human-fertilisation/1849.html

Fertilisation and Implantation

Menstruation One change that happens to girls at puberty is that they start to undergo a monthly cycle called the menstrual cycle. This cycle is a process where the uterus lining builds up to receive a fertilised egg. If an egg is not fertilised then the lining of the uterus breaks down and is lost from the body. This is called menstruation or a period.

The Menstrual Cycle

What is it like for girls to start their periods http://www. bbc. co What is it like for girls to start their periods http://www.bbc.co.uk/learningzone/clips/female-puberty-and-menstruation/1843.html menstruation http://www.bbc.co.uk/learningzone/clips/the-female-menstrual-cycle/1847.html

Plenary – what have we learned? Write down 9 of these words/numbers In a bingo grid. Your teacher will ask 9 questions The winner is the first one to find the 9 answers on their grid. Menstruation. Menopause. Ovulation. 14. Fertilisation . Puberty. 5. lining. Fallopian tube. Periods. Dead egg. Hormones. Uterus. 28.