have sex." 3. Vaginal dryness Vaginal dryness becomes much more common after the menopause, when levels of the female hormone oestrogen drop. Dr Jarvis said: "If this is your main problem, a topical form of HRT, such as pessaries, gel or a vaginal ring, can often solve the problem. "Several non-hormonal vaginal moisturisers are also available from the pharmacist. "However, vaginal dryness can also arise because of lack of arousal or anxiety – if you think this might be the case, speak to your GP." 4. Premature ejaculation Premature ejaculation is common and isn’t due to a serious underlying medical condition. Dr Jarvis said: "One of the most common causes is anxiety and it’s more common in younger men. "Sometimes just relaxing and taking your time about sex is enough to solve the problem. "Otherwise, there are creams and tablets available on prescription." 5. Infertility Lots of women worry about conceiving, but often there is no cause for concern. Many couples take several months to conceive, but six in seven will conceive within a year of trying and more than nine in 10 conceive within .