Although most cases of HPV, or human papillomavirus, in very young children are the result of non-sexual transmission, a medical evaluation should be conducted, researchers say in the medical journal Pediatrics.

There is disagreement regarding the origin of HPV in children, senior investigator Dr. Sara H. Sinal told Reuters Health.

What things can effect the woman sexual life ?

The sex drive of women plummets sharply as they juggle the increasing demands of partners, children and careers, researchers said .

One in 10 women questioned for a survey admitted losing interest in sex for at least six months in the past year.

"The next major problem was the inability to have an orgasm. That was reported by four percent of women," said Dr Catherine Mercer of University College London after a British study was made of over 11,000 men and women aged 16-44.

Viagra, developed to treat of male erectile dysfunction, is a phosphodiesterase (PDE)-5 inhibitor that affects very small blood vessels. Studies have shown it improves circulation in other conditions, such as coronary artery disease.

In an experiment that monitored diabetic children's nighttime blood sugar on sedentary and active days, researchers found that the risk of hypoglycemia -- abnormally low blood sugar -- was greater on exercise days.

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