Pregnancy Timeline: Conception Date & Due Date Calculation

Question
if i am due april14 and my conception date was july 21 does that
mean that i had intercourse on the 21 and got preg, i had
intercourse also on july 4 could i be pregnant from the 4. i am
hoping that i am preg from the day of the 21.please help me
shonniece

Answer
If you are due on April 14, you ovulated on April 27 and could have conceived if you had sex on April 13,14,15, or 16. Ovulation usually is 14 days from the first day of your period. Are you basing your due date on the first day of your period or by a sonogram? You can only become pregnant from one day prior to ovulation up to two days after ovulation. If you ovulated on July 21, your last period would have started on July 8, and you could only conceived if you had sex on July 7,8,9, or 10. How do you know when you conceived? How did they determine your due date? When did you have a sonogram performed?