Multiple studies have found a potential link between Depo-Provera birth control injections and meningioma tumors. More than a thousand women are now suing Pfizer, the maker of Depo-Provera, alleging the company chose to “ignore relevant safety concerns.” Pfizer told NBC News it “stands by the safety and efficacy of Depo-Provera”. NBC News’ Zinhle Essamuah reports. | NBC Nightly News with Tom Llamas

A small but growing number of women in the UK believe they’ve developed benign brain tumours after using the contraceptive injection known as Depo-Provera. It’s after research published in the British Medical Journal found that women who use the injection for more than a year could increase their risk of developing the tumours by as much as 500%. The overall risk of the tumours, known as meningiomas, remains extremely low. Claire Buck and Tammy Croston, who have both undergone traumatic brain su