The 'herbal womb detox pearls' are designed to "cleanse the womb and return it to a balanced state".
The idea of the detox is that you pop the pearls into your vagina after your period has finished. They then supposedly cleanse all of the bad stuff away, which women will then see in their discharge a few days later.
Unsurprisingly, a leading sexual health charity has warned women against using the product.
Bekki Burbidge, the head of communications from sexual health charity FPA, said she "urges women not to buy them".
"The vagina is very good at cleaning itself and using perfumed products can upset the balance of the normal bacteria, rather than help," she explained.
"Perfumed products have been linked to bacterial vaginosis, which is the most common cause of unusual vaginal discharge, and can also increase the risk of developing thrush.
"If women are concerned about the smell of discharge or notice a change from their normal discharge, it’s important not to try and mask this with products as it could be linked to an infection - instead, it's a good idea to get checked out by a doctor.
"The best way to wash this part of the body is to use plain, unperfumed soap and water to clean the vulva (external female genitals). There is no need to use water or products to flush or detox inside the body."
She added: "It looks as if someone has found an opportunity to make money by preying on women who worry about how they smell."
The womb pearls, sold by Embrace Pangaea, are made up of "ancient herbs" such as mothersworth, cnidium monnieri, angelica, borneol and rhizoma.
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According to the site, the pearls can help correct bacterial vaginosis, foul odour, yeast infections, endometriosis and fibroids.
The pearls are attached to long pieces of string. In a demo for the product, women are encouraged to tie a knot in the end of the string and then to insert between one and four pearls into the vagina at one time.
After women have had a pearl inserted in their womb for 72 hours (or three days) they are advised to remove the pearl, using the string attached to it.
Users are told to expect discharge over the next few days, during which time they are encouraged to wear pantyliners.
"Vaginal tightening packages" and "fibroid packages" are some of the other products featured on the website.
[H/T Metro]