EE bonds purchased in the current period mature at twenty years and go into an automatic extension for ten years. These bonds accrue interest every month. If you bought a paper bond between May in 1997 and the end of April 2005, however, the interest rate varies according to a market based rate.
Freebase(0.00 / 0 votes)Rate this definition: Oogenesis. Oogenesis, ovogenesis or oÃ¶genesis is the creation of an ovum. It is the female form of gametogenesis; the male equivalent is spermatogenesis. It involves the development of the various stages of the immature ovum. OÃ¶genesis. Å-Å-jenâ²e-sis, n. the genesis and development of the ovumâalso OÃ¶gâ²eny.âadj.
Oogenesis is the process by which the female gametes, or ova, are created. The female gamete is called an ovum. Sometimes people will refer to female gametes as eggs, but the term egg can include more than one stage of development, and the definition of an egg also changes depending on the type of organism.