Unit 2 : Contraception
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Give a definition for contraception
• The intentional prevention of conception through artificial or natural means
Give two examples of barrier methods ?
• Condom • Cervical Cap
How do barrier methods prevent conception ?
• They prevent sperm from entering the uterus and eventually reaching the egg
State how IUD prevents implantation?
• it alters the thickness of the cervical mucus
What is a calendar based method ?
• Basically avoiding sex during a women’s fertile period
Describe sterilisation in males
• Cutting and closing of the sperm tube in each testes
Describe sterilisation in females
• Cutting and closing of the oviducts
What are three chemical methods of contraception?
• Combination Contraceptive Pill • Mini Pill • Morning After Pill
What does the combination contraceptive pill contain?
• Synthetic oestrogen and progesterone
How does the Combination Contraceptive pill work?
It mimics the negative feedback on the pituitary gland so FSH and LH don’t get released
How does the mini pill work ?
• It causes thickening of the cervical mucus so the sperm cannot enter the uterus
What does the morning after pill contain?
HIGH levels of synthetic oestrogen and progesterone
How does the morning after pill help prevent conception ?
• Delays ovulation • Prevents implantation
What does the mini pill contain ?
Progesterone only