Evolution and survival of the fittest are not the same thing. Evolution refers to the cumulative changes in a population or species through time. Survival of the fittest is a popular term that refers to the process of natural selection, a mechanism that drives evolutionary change.
Most doctors recommend that you wait until the first day of your missed period before taking a home pregnancy test. A missed period is usually one of the first signs of pregnancy. This is usually around two weeks after conception. However, some tests are more sensitive than others and can be taken earlier. Concentrations of hCG are reported in milliInternational Units (mIU) or amounts equal to 1/1000th of an IU per milliliter.
Best Answer: Wait to take a test until your next period is due. I know it seems like a long time wait when you think you may be pregnant, but you will have more accurate results waiting that long or even longer. There are tests that say they can tell you up to 5 days before your period is due, but you may get a false negative. Good luck.