If you are pregnant in July, your last menstrual period should be in June, and your due date is usually in March or April of the second year. The due date is calculated by adding 9 or subtracting 3 from the month and adding 7 to the date. If the pregnancy is in early July, the due date may be the end of March of the second year; if it is in mid or late July, the due date may be April of the second year. The due date is only an expected date and it is normal to give birth around the due date. If you have irregular periods, it is more accurate to estimate the due date by keeping the results of the first ultrasound examination after pregnancy.