The ninth month of pregnancy typically begins around week 36 or To calculate this, count from the first day of your last menstrual period (LMP). If your LMP was on March 9, add nine months to that date. This will give you an estimated due date, which falls at the end of the ninth month. Keep in mind that every pregnancy is different, and it's best to consult with your healthcare provider for accurate information and personalized guidance throughout your pregnancy journey.