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.
Due Date Calculator. Use our Pregnancy Due Date Calculator to find out when your baby is due, and get started planning for that exciting arrival. Your doctor or midwife uses the number of weeks since your last menstrual period to estimate how far along you are in your pregnancy. This calculation is for an average pregnancy (40 weeks). Your pregnancy may be longer or shorter. Only 5 percent of women deliver their babies on their projected due date.