@71smith - Well, the typical length of a pregnancy is considered to be 40 weeks from the beginning of your last menstrual period. One egg (usually) is released in each menstrual cycle, and viable sperm needs to be introduced while the ripe egg is present. And your fertile time of cycle is usually 5-21 days after your period begins.

So I would say neither date you are offering fits. Counting back 40 weeks from your due date, which the provider usually does based on fetal growth and development, says your last period was around May 20th. Sperm from April or February, 1 and 3 months earlier, would not be viable (able to impregnate).

How certain is the provider of your due date? A look at the calendar indicates you probably became pregnant around the last week in May.