Sex Map of Britain

For some couples unable to conceive naturally, IVF or sperm banks are not an option - but the internet offers them an alternative.

This extraordinary film offers a window on a little known world in which couples search online profiles and Facebook groups to find their perfect sperm donor, and the men fathering scores of children up and down the country explain why they donate.

The film follows the couples as they collect their sperm and try to get pregnant, sometimes in unusual places. This film captures a series of memorable stories of couples trying to achieve their dream.

In the last ten years diagnoses of chlamydia, gonorrhoea and syphilis have more than doubled.

BBC Three goes inside the consulting rooms of one of London's busiest Sexual Health clinics to see if Brits pay enough attention to their sexual health. Diagnosing unexplained pain, HIV tests and removing genital warts are all in a day's work for the ‘sex doctors' and nurses at this East London clinic.

Mia and Tashion are transgender escorts in high demand. But for both, their source of income is also the source of turmoil. Cameras follow them as they embark on deeply personal journeys, grappling with their own identities and relationships as they consider whether to remove a part of their bodies that makes them money.

Ella Hughes and Chessie Kay are rising stars in the UK porn industry.

But why have they chosen to make money this way, what is the reaction of their family and friends, and how does the reality compare to the manufactured fantasy they are creating for their clients? BBC Three hears them explain why they have opted to carve a business out of their bodies.

Sheil Road in Liverpool is notoriously one of the cheapest places to buy sex in the UK. This is the stark and unforgiving story of the women driven to sell sex, some for as a little as four pounds.

We hear the heart-wrenching story of Natalie, pictured, whose life has dramatically changed over 12 months living on the road. Now trapped in a cycle of soliciting sex illegally to feed her drug addiction, and with competition driving down the prices she's able to charge, can rehab be an escape route for her?