exists and is an alternate of . When a female fetus is born, her ovaries already contain approximately 2 million immature eggs (called oocytes). As a gril develops through childhood, the number of oocytes in her ovaries decrease until puberty, when the first mature ovum is released, at which point her ovaries contain approximately 400,000 oocytes.
John Davison Rockefeller Sr. (July 8, 1839 â May 23, 1937) was an American business magnate and philanthropist. He was a co-founder of the Standard Oil Company, which dominated the oil industry and was the first great U.S. business trust. Rockefeller revolutionized the petroleum industry, and along with other key contemporary industrialists such as Andrew Carnegie, defined the structure of modern philanthropy.
He was the only son among the five children of Standard Oil co-founder John D. Rockefeller and the father of the five famous Rockefeller brothers.In biographies, he is commonly referred to as Junior to distinguish him from his father, Senior.ockefeller was the fifth and last child of Standard Oil co-founder John Davison Rockefeller, Sr. (1839â1937) and schoolteacher Laura Celestia Cettie Spelman (1839â1915). His four older sisters were Elizabeth (Bessie) (1866â1906), Alice (who died an infant) (1869â1870), Alta (1871â1962), and Edith (1872â1932).