This article gives a brief historical review of the evolution of power electronics over the past 100-plus years. It includes electrical machines, mercury-arc rectifiers, gas tube electronics, MAs, power semiconductor devices, converter circuits, and motor drives.
Gender Prediction Test. Intelligender is an at-home gender test that uses a urine sample from the mother. It can be given as early as 10 weeks into pregnancy and as late as 34 weeks. It is done completely at home. Laboratory tests have proved over 90 percent accurate, with at-home tests proving up to 82% accuracy.
Updated February 13, 2017. Most women take a home pregnancy test (HPT) when they have a pregnancy symptom or two. For many women the first pregnancy symptom is usually a missed period. You may have other pregnancy symptoms as well. Pregnancy tests are usually good at the minimum on the first day that you miss your period.