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Professor John Studd, a Harley Street gynaecologist who specialises in treating women with libido problems, says he is now successfully using lower-dose testosterone patches on up to 50 patients a week, in an attempt to restore their sex drives.
Martin Godfrey, a GP in Central London who has treated many women suffering from a reduced sex drive, says the proliferation of libido-boosters for men, such as Viagra, also seem to be exacerbating the problem On some women, he uses oestrogen patches instead, as inadequate levels of the so-called 'female' hormone can also drastically impact on a female's desire for sex.
'My first relationship didn't start until I was 20 and studying at university,' she says. I just didn't feel much excitement or sexual responsiveness, and my boyfriend wasn't really interested in understanding what the problem was.
However, the contraceptive Pill prescribed to regulate her periods and, hopefully, to improve her hormone levels and libido, seemed to reduce her sex drive even further, and doctors were unable to offer any alternative.
Efforts to develop a testosterone patch, called Intrinsa - billed as the female answer to Viagra - in 2004, were abandoned because of fears the hormone treatment could cause blood clots or the development of bodily hair and other male characteristics.
Although other lower-dose, safer versions of the patches have come on to the market, they are not licensed to be prescribed by the NHS, so doctors wanting to prescribe it to women have to do so privately.
Nicci, who writes health handbooks for a living, says: 'It's ironic that Sex And The City and erotic literature such as Fifty Shades Of Grey have meant that people talk about sex more than ever, but are probably doing it less than anyone realises.'Contrary to popular opinion, testosterone is not just a male hormone.
Healthy young women have ten times more testosterone than oestrogen circulating in their bodies, and it regulates mood, energy and libido in women almost as much as it does in men.
Such incidents epitomize Parker and Stone's strong views on freedom of speech.
Production of the hormone is stimulated by regular sex - meaning once a woman loses interest in intercourse, it can become a vicious circle.
But levels of testosterone in women decline naturally by an average of 50 per cent between the ages of 20 and 45, and continue to decline - though rather less dramatically - as part of the general ageing process.
Hospitals that used to supply libido-boosting hormone implants and patches to women are refusing to do so on the grounds of cost.
Martin Godfrey, a GP in Central London who has treated many women suffering from a reduced sex drive, says the proliferation of libido-boosters for men, such as Viagra, also seem to be exacerbating the problem.
With her stunning looks and voluptuous figure, Nicky Allen is used to turning men's heads.