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.
Osteogenesis imperfecta (OI) is a genetic disorder that causes a person's bones to break easily, often from little or no apparent trauma. OI is also called brittle bone disease.. OI varies in severity from person to person, ranging from a mild type to a severe type that causes death before or shortly after birth.