Hormonal imbalance: Menstrual irregularities are not uncommon and anovulatory cycles are one cause. You may wish to repeat the pregnancy test in 3-4 days. If you miss more that two periods, please see your doctor. You may consult this site for more info. http://www.nichd.nih.gov/health/topics/menstruation/conditioninfo/pages/causes.aspx
Answered 7/13/2014
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