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.
Pregnancy Wheel. The other way to calculate your due date is to use a pregnancy wheel. This is the method that most doctors use. Itâs very easy to estimate your due date if you have access to a pregnancy wheel. The first step is locating the date of your LMP. When you line up that date with the indicator, the wheel will display your due date. Itâs important to remember that the due date is only an estimate of when you will deliver your baby.