Technique: If you did the test more than 4-5 days after the missed period, did it correctly, a negative test essentially rules out pregnancy. Menstrual irregularities are not uncommon and a common cause is anovulatory cycles. You may wish to consult this site and discuss the matter with your doctor. http://www.nichd.nih.gov/health/topics/menstruation/conditioninfo/pages/causes.aspx.
Answered 11/30/2013
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