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.
A pregnancy due date is actually calculated as 40 weeks from the first day of the last menstrual period. If you are counting âlunar monthsâ which are only 28 days like a period cycle, then it is 10 âlunar months.â If you count full calendar months that are 30 to 31 days long, then it is really only 9 months.he doctor will estimate a due date by adding 40 weeks or 280 days to the first day of your last menstrual period. Remember, this is only an estimated date and only a small percentage of babies are actually born on the exact date.