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.
Testing at Home. The pregnancy tests you take at home measure the amount of hCG in your urine. Each type of test is different; some are able to detect much lower amounts of hCG than others. If you plan on testing early, purchase a test designed to detect at least 20 mIU of HCG.