what's the cycle of pregnancy
Confidence votes 16. pregnancy is dated 40 weeks from the date of your last period. The first day of your last period counted as day one. You usually conceive during the middle of your cycle so when you find out you are pregnant, usually when you miss you next period you are said to be 4 weeks pregnant but the fetus is only actually 2 weeks old. pregnancy is dated 40 weeks from the date of your last period.