Over-the-counter estrogen products are available in pill form. Estrogen levels in women who are still menstruating drop after menopause. People might shop around when choosing an over-the-counter medication by comparing possible side effects.
Updated November 25, 2016. Classification is a data mining technique that assigns categories to a collection of data in order to aide in more accurate predictions and analysis. Also called sometimes called a Decision Tree, classification is one of several methods intended to make the analysis of very large data sets effective.
Classification of living things is called Taxonomy.. This is when scientists put organisms into groups when they have things in common. The first groups they use are the Kingdoms. There are five kingdoms: