Polysomnography is used to diagnose, or rule out, many types of sleep disorders including narcolepsy, idiopathic hypersomnia, periodic limb movement disorder (PLMD), REM behavior disorder, parasomnias, and sleep apnea.
Calculating Due Date: Estimated Due Date. Based on the last menstrual period, the estimated due date is 40 weeks from the first day of the period. This is just an estimate since only about 5% of babies are born on their estimated due date.
Answers. 1  Try using DateDiff or DateAdd to get a due date, as example DateAdd(d, 30, billingDate) or DateAdd(d, 60, billingDate) to get different intervals (here 30 and 60 days past the billing date) Marked as answer by Bessie Zhao Friday, August 27, 2010 9:35 AM. 2  Use the DateSerial() function to get any date you want. WHERE (((Table1.[Due Date])>=DateSerial(2010,1,1) And (Table1.[Due Date])<=DateSerial(2010,1,31))); In the above SELECT statement, the IIf() function creates a field named STATUS. Also, WHERE limits the [Due Date] field to the month of January 2010. WHERE is the criteria for the [Due Date] field.