Unit 4: Reproduction B4

• Biologie
• Middelbare school
• vwo
• Leerjaar 3

Planning

• Quick recap last class
  
• Basic 4: Menstruation

Learning goals

• You know what menstruation is 
  
• You can explain what happens during the menstrual cycle
  
•  You know what woman use during menstruation to stay hygienic.

Menstruation

When an egg is not fertilised, part of the uterus lining detaches. This is menstruation.

Average age for girls to start their menstruation is 13.

The menstrual cycle

• After the menstruation the uterus linings starts to grow thicker again and have more blood vessels.
  

•  Ovulation start +- around 14 days after the start of the last menstruation.

• Next menstruation starts about 28 days after the start of the last one.

Egg cells survive for 1 day,
Sperm cells about 2 to 3 days in the uterus.

What days are the fertile period
(vruchtbare periode) for the woman?

most used menstruation products

Tampons

Tampons are inserted into the vagina. 

They soak up the blood and mucus. 

Should be exchanged every 3 to 4 hours. 

pads

Pads are available in all kinds of shapes and sizes. 

The go into the woman's underwear and soak up any blood and mucus. 

Organicup

The organicup catches and blood and mucus. The picture shows how to insert it. 

You can empty and wash it every few hours.

These kind of underwear are still quite new

They catch the blood. You can wear them up to 8 hours and then wash them.

Misconceptions

 Try to find as many misconceptions about the male and female reproductive systems/sex/menstruation.

 We will discuss them in about 10 minutes.

Homework

4.4 Exercise: 13 and 14

Done?

Check if you made the follow exercises:

B1: 1, 2, 3 and 4.

B2: 5, 6,7

B3: 9,10,11,12