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.
Overview. 1  Whether a woman has missed her menstrual period or simply âfeels pregnant,â home pregnancy tests offer the convenience of testing without having to make a doctor appointment. Home tests sense the hormone hCG, which is produced by the chorion (part of what will become the placenta) of a developing embryo.