If you have a shorter cycle, your due date will be earlier.
Note: Again, you don't necessarily conceive on the day you have sex.
This is the same type of gestation calculator that health care professionals use to tell you your due date, but ours has been customized to add important ovulation predictor information as well.
Pregnancy wheels are used to calculate due dates and fetal development based on the last menstrual cycle of the expectant mother.