How to calculate conception date? My marriage date may 20 Wife got her menses on may 14. She is conceived when we tested HCG in urine at doctors place followed by ultrasound but nothing is visible in ultrascan it's empty. They are telling 5 weeks 4 days pregnant Please help.

Suggestions offered by doctors on Lybrate are of advisory nature i.e., for educational and informational purposes only. Content posted on, created for, or compiled by Lybrate is not intended or designed to replace your doctor's independent judgment about any symptom, condition, or the appropriateness or risks of a procedure or treatment for a given person.