Conception Date Calculator: Calculating Pregnancy Timeline & Due Dates

No, it is not possible for your son to have been conceived on August 7 or a week before if he was born on April 28. The average human gestation period is 40 weeks, or 280 days. This means that conception typically occurs about two weeks before the last menstrual period (LMP). If your son was born on April 28, his LMP would have been around July 25. August 7 is 28 days after July 25, which is not enough time for a full-term pregnancy.