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 normally lasts from 37 weeks to 42 weeks from the first day of your last period. To find your due date, use the drop down menus below to enter the date of the first day of your last period, and click 'calculate date' - the calculator will do the rest.regnancy due date calculator. The calculator on this page can help you work out when you might expect your baby to arrive. This will give you a rough idea. As part of your antenatal care, your midwife will also offer you a dating scan that will give you a more accurate date for the birth of your baby.