And yet... do you think the date of conception affects the date of bir…

And yet... do you think the date of conception affects the date of birth? ? Due date: March 31st. Ultrasound: April 1st. Post-month: June 24th, and conception was either July 6th or 8th. Definitely not earlier than that, as husband wasn't in the country, but also not later - according to the HCG, it coincided with the conception date ? I sit here and think, when to prepare - and it seems like rushing somewhere, but I don't like waiting, when I don't know the exact date ?