In June 2025, women using weight-loss injections were advised to use effective contraception due to potential impacts on the effectiveness of birth control pills. The warning was issued by the UK's medicines regulator, highlighting concerns about the unknown effects of these medications on unborn babies. The medicines in question include weight-loss jabs such as Wegovy and Mounjaro. The regulator emphasized that it is uncertain whether these medications could harm a developing fetus. This uncertainty prompted the recommendation for women to use reliable contraceptive methods while undergoing weight-loss treatments. The warning comes amid growing popularity of weight-loss injections, which have been marketed as effective tools for managing obesity and related health issues. These injections work by mimicking natural hormones in the body to regulate appetite and promote weight loss. However, their interaction with hormonal contraceptives remains a subject of ongoing research and caution. Women who are considering or currently using these weight-loss jabs are advised to consult with healthcare providers to discuss alternative contraceptive options. The regulator's guidance aims to ensure the safety of both the mother and the unborn child, emphasizing the importance of informed decision-making in medical treatments.