Can gender rules be fair to Caster Semenya and her rivals?
Cheating in sport is becoming ever harder to judge
There are many issues to deal with in trying to ensure fairness in sport - doping, technology and now gender.
Stumble at the starting block
Despite being a record breaking athlete, Richard Whitehead cannot compete in a paralympic event because he has the wrong disability
Ignored and unpaid (female) sporting heroes
England are world champions in netball but you wouldn't know it
Cheating at sport
Pressure to win can turn children into sports cheats
How active are women
Despite recent Olympic fever, British women remain indifferent about sport
Cycling: Women on the slow road
Women's cycling has not had the same support as the men's sport. But some determined women are out to change that
The girl who played boys' football
Personal account: As a 12-year-old girl playing boys' football Niamh McKevitt was unique, and targeted.
It's good news that athletes have failed drugs tests
Denise Lewis is pleased that cheats are exposed and punished.
Running for charity
Women are racing ahead of men when it comes to running for good causes
An insight into the physical activity of the nation
What is banned
The world Anti-Doping Agency's list of banned drugs and methods.
Doping - the rules
What is classed as doping, why it is wrong and what happens to those caught doing it.
Some examples demonstrate how complicated it can be to apply the rules about doping in sport.
Faster, Higher, Stronger - Fairer?
Is it fair for transgender athletes to take part in women’s competitions?
My son wants to quit football for dancing - his dad isn't happy
Agony uncle, Graham Norton, advises on a family conflict