Genetics And Inheritance Flashcards
Why might a couple use contraception
Sometimes fertilisation of an egg is not always desired by a couple having sexual intercourse so they would use a method of contraception
What is the natural method of contraception
This depends on the woman knowing her menstrual cycle and not having sexual intercourse during the time of the month when an egg is in her oviduct
When is the egg released from the oviduct
After ovulation (day 14)
Why is the natural method not always reliable (3 points)
Periods may not be regular
Egg may be released early or late
The couple may still end up having intercourse
What is the chemical method of contraception
By taking a pill, the pill contains the hormones which prevent ovulation taking place. (Egg not released) Therefore, no egg is released during the woman’s monthly cycle
How often is the chemical method’s pill taken
once a day
What are 2 side effect of the chemical method’s pill (3 side effects)
Weight gain
Increased risk of stroke/ heart attack (due to increased risk of blood clots)
Mood swings
What is the mechanical method of contraception
This relies on preventing sperm and egg meeting
Eg. The condom
How does a condom prevent sperm and egg meeting
This provides a complete barrier between the perish and the vagina to prevent sperm entering the woman’s body
What else as well as sperm and egg meeting can a condom prevent
STI’s (sexually transmitted infections)
How is a diaphragm used
This is a circle of rubber inserted into the top of the vagina to prevent the sperm travelling into the uterus and oviduct
What is the surgical method of contraception
When a couple have had as many children as they want, they may decide that one of the, should have surgery to ensure that they will not have anymore. This is called sterilisation.
What is the surgical method of contraception for females
The oviducts are cut and sealed so no sperm can reach the eggs
What is the surgical method of contraception for males and what is it called
It is called a vasectomy and involves cutting the tubes that carry the sperm
What are sexually transmitted diseases
These are diseases passed from one person to the next during sexual intercourse
What is gonorrhoea caused by
Bacteria
What are 3 symptoms of gonorrhoea
Burning sensation when urinating
Yellow discharge from the perish or cervix
Can lead to sterility if not treated
What treats gonorrhoea
Antibiotics
What could happen if gonorrhoea remains untreated
The person may develop problems with their joints and may lead to sterility
What is AIDS caused by
A virus called HIV
How is AIDS passed to a new person
Sexual intercourse with an infected person
Use of intravenous needles from an infected person
Mixing of blood
Is there a cure for aids
No
