Difficult: If you have had many sex partners you may try to figure out who you were with about 20 weeks ago. If unsure consider dna testing when the baby is born.
Answered 9/12/2013
4.9k views
Date of ultrasound?: You need to tell us the day on which the ultrasound was done in order for us to give you our best guess about the time of conception. At almost 20 weeks, the uncertainty could be plus or minus 1-2 weeks! were there any earlier exams?
Answered 9/13/2013
4.9k views
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