Would a depo shot cause a false negative pregnancy test
Not medical advice: The Depo-Provera birth control shot does not cause false negative pregnancy test results. Less than 1 out 100 users will get pregnant if they get the shot regularly (every 12 weeks) and use back up birth control if it is received more than 7 days after the start of a period. Approximately 6 out of 100 users will get pregnant in a year if the shot is not used as directed by a physician.
Some users have reported that it took them around 6 to 10 months to get pregnant after receiving their last shot.
A recent study published in an issue of Cancer Research found that recent users of Depo- Provera for 12 months or more were twice as likely to develop invasive breast cancer. This is the 5th study of its kind that was conducted in different countries and produced similar results.