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.
This pregnancy calculator works out the due date of your baby. Simply enter the first day of your last menstrual period and click the Calculate button. Along with the due date, it also estimates the conception date and the gestational age (or how many weeks pregnant you are). Note: The calculations provided are only estimates based on averages and should be treated as such.