The germinal period ends approximately two weeks after conception. <span> This </span>stage<span> occurs during the first 2 weeks of development (or the 2nd - 4th weeks of pregnancy). The union of the sperm and egg cell forms a single cell called a zygote. </span>
Both are used for energy to the body.
One of the negative impacts of eutrophication and increased algal growth is a Loss of oxygen known as anoxia
