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.
In order to use this calculator, you must know either the first day of the last menstrual period or the due date. as calculated by your health provider. Select either the First Day of Last Menstrual Period or the Due Date. 1  Enter the date (corresponding to what you selected above, either the First Day of Last Menstrual Period or the Due Date). 2  Push the Calculate Dates button. (Note: Scroll down to see your results).