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 name of the process by which female egg cells or oocytes develop to create an ovum, or egg cell. These cells go through a three step process; oogonium t â¦ o a primary oocyte, secondary oocyte, and finally an ovum.The whole process occurs in the female ovaries.n ascaris, the oocyte does not even begin meiosis until the sperm touches it. Oogenesis is the process in which the primary oocyte turns to an ovum undergoing meiosis. At first there is a diploid oocyte called the primary oocyte.