article_snippet.sent: Dr Xiao-Ping Zhai explains to Vanessa Engle for the documentary Inside Harley Street, which airs tonight on BBC2.
article_snippet.sent: The BBC documentary Inside Harley Street also looks at other alternative therapies on offer for various ailments. '
article_snippet.sent: Leech therapist' Maryam Rahbari, pictured, says the worms can work wonders for the health . '
article_snippet.sent: As well as looking at alternative therapies for infertility on Harley Street, tonight's documentary also looks at the other unusual treatments - such as applying leeches to the skin to relieve pain - that people are turning to when traditional western medicine hasn't helped people.
article_snippet.sent: Inside Harley Street: Make Me Well is on BBC2 at 9pm .