A member asked:

Been on mirena for 8 mos w/2 full periods in this time, last on sept 10. had unprotected sex sept. 14. had pink/brown spotting oct. 9-11 w/mild cramps and headaches. neg. pregnancy test oct. 10. could this be a false negative or effects of mirena?

A doctor has provided 1 answer

Tests are accurate: Home pregnancy tests are very accurate and not affected by foods, herbs, common illnesses, sexually transmitted diseases, or medications. A correctly done urine test gives a reliable result by 3 weeks after sex (3 weeks after when conception might have happened) or 1 week after missing a period. If done sooner, a positive result is likely real, but a negative result may be due to testing too soon.

Answered 10/13/2019

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