1 Subtract eleven days from the total number of days to find the last fertile day in your cycle. 2  For example, if your longest cycle lasted 31 days, your last potentially fertile day in each cycle would be the 20th day in the cycle (31 - 11 = 20).
Why you shouldnât work up until your due date. I nearly gave birth to my son at work. Right there on the third floor of the sea foam-green AAA building on Van Ness Avenue, where I was working at the time. Luckily, my coworker Nino convinced me to go to the hospital when I told him that I was feeling crampy.
1 Pregnancies usually last from 37 weeks to 42 weeks. 2  To work out your due date, you need to count 40 weeks from the first day of your last period. 3  You can get a result from a home pregnancy test as early as a day after your period is due.orking out your due date. To work out your due date, you need to count 40 weeks from the first day of your last period. You could even try working out your date from when you think you conceived â tricky for most women as they won't know exactly when they ovulated!