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 group of genetic diseases of collagen in which the bones are formed improperly, making them fragile and prone to breaking.bservations In its most severe form, the disease may be apparent at birth, when it is known as osteogenesis imperfecta type II. The newborn has multiple fractures that have occurred in utero and is usually severely deformed because of imperfect formation and mineralization of bone.