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.
Use our Due Date Calculator to help you work out your baby's due date. Your midwife will calculate your due date when you meet her at your first booking appointment. Your midwife will write down your due date in your maternity notes. You may see the date written as expected date of delivery, or EDD, in your notes.our first ultrasound scan will give you a more accurate due date for your baby. You will have your estimated due date confirmed at your dating scan between 10 and 14 weeks of pregnancy. The person carrying out the scan, called a sonographer, will work out how pregnant you are by looking at your baby on the screen.