![]() ![]() What are Pregnancy Tests?Īn at-home pregnancy test measures levels of a hormone called human Chorionic Gonadotropin.Īlthough everyone has some hCG, the levels increase in pregnancy to aid growth and preparation for childbirth. It also explains how twin pregnancy can help. ![]() This guide by USARx describes how pregnancy tests work and what causes them not to give a true negative result. In online parenting forums women had shared experiences of getting false positives from the test – in one post, one even speculated that there could be a faulty batch.Can Twins Cause False Negative Pregnancy TestĪ false negative pregnancy test occurs when your pregnancy test says that you’re not pregnant, even though you know you are.įalse negatives can be more easily identified, such as when hormones used for pregnancy detection are not yet high enough.ĭid you know that a twin pregnancy can also cause a negative test? The test’s packaging claims that it is “over 99% accurate”, with a “clear digital reading” and results in five minutes. “We are very sorry for any inconvenience and upset that this manufacturing fault may have caused, and we are working closely with the manufacturer to ensure the accuracy of future supplies.” “We can assure you that all other Clear & Simple tests remain over 99% accurate as they always have been, and you can rely on results given. “The majority of users of this lot have received accurate results when using the tests,” it said. In a statement posted on its website on Thursday the UK distributor of the test, Healthpoint, said affected stocks had been removed from shops and were in its warehouse awaiting destruction. “At MHRA we need to make sure our response to any report of device faults is proportionate and pragmatic.”Īround 15,000 tests had been quarantined or returned by the retailers, the MHRA added. A spokesperson said: “When MHRA received the notification from the manufacturer we began our own internal processes to clarify the situation, including working out the magnitude of the issue and potential risks to public health. The MHRA said it had received details of the problem on 7 September. ![]() This allows patients and healthcare professionals to tell the regulator about any issues with a drug or medical product used in the UK. McPherson said that anyone who had problems with the product, or with any other medical device, should report it via the MHRA’s Yellow Card scheme. Dr Duncan McPherson, the MHRA’s clinical director of medical devices, said: “If you have any questions about using digital pregnancy tests, please speak to your healthcare professional.” The MHRA urged people to check if they had one of the affected packs. People who have bought one of the affected batch have been advised to return it to the place of purchase and to seek an alternative test.Īccording to advice from the NHS, a positive test result is “almost certainly correct”, while “a negative result is less reliable”. The lot number can be found on the end of the box and is also printed on the sachet containing the testing stick. They have been available in the UK since last November. The faulty kits all carry the same lot number, DM10220170710E, and have an expiry date of 9 January 2020. The Medicines and Healthcare Products Regulatory Agency (MHRA), which oversees medical devices and drugs in the UK, said that it had been alerted to the problem in early September. More than 58,000 affected kits were distributed in the UK, according to the manufacturer, Guangzhou Wondfo Biotech. ![]()
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