Unit 2 Physiology and Health Chapter 9c Contraception

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Presentation transcript:

Unit 2 Physiology and Health Chapter 9c Contraception Higher Human Biology Unit 2 Physiology and Health Chapter 9c Contraception

What You Should Know What are the two categories of contraception? Give examples of physical methods? What is the basis of chemical contraception?

Contraception is the intentional prevention of conception or pregnancy by natural or artificial means

Physical Methods of Contraception Barrier methods use a device to physically block the sperm from reaching the ova Intra uterine devices (IUD) Condom Diaphragm Cervical cap Sterilisation procedures

Chemical Contraception Hormonal methods Combinations of synthetic hormones Mimic negative feedback by preventing release of FSH/LH Some prevent implantation (‘morning-after pills’) some cause thickening of cervical mucus (‘progesterone- only/mini-pill).