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.
This estimate is based on the last menstrual period and the estimated date of conception. Your pregnancy due date calculator works by adding 40 weeks (280 days) to the approximate first day of your last menstrual period or 266 days to the day of ovulation.Try our Reverse Due Date Calculator to find out when you became pregnant.our pregnancy due date calculator works by adding 40 weeks (280 days) to the approximate first day of your last menstrual period or 266 days to the day of ovulation.