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.
As a result, most people, including health professionals, will date your pregnancy based on your LMP (last menstrual period) instead (NHS 2013a) . To work out how many weeks pregnant you are by this measure, try to remember when your last period started. The first day of your LMP counts as day one of your pregnancy.You can find out your estimated due date using our handy due date calculator. Some women prefer to count their pregnancy from the day that they were likely to be ovulating during the month in which they became pregnant.This will give you an estimated date of conception, which will usually be about two weeks after the first day of your LMP.So you will be two weeks further along in your pregnancy if it's calculated according to your LMP rather than your estimated date of conception.he first day of your LMP counts as day one of your pregnancy. You can find out your estimated due date using our handy due date calculator. Some women prefer to count their pregnancy from the day that they were likely to be ovulating during the month in which they became pregnant.