Pregnancy ?: With the data provided, pregnancy is more probable on 5/11. With a "30-day cycle" and the average life of viable sperm, ovulation is most predictably on "day 16" , or "5/11". Your "EDD" is of course just a statistical probability, and subject to many factors. Ultrasound from the 8th through the 12th week is a fairly reliable way to determine EDD.
Answered 9/14/2014
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