Most are said to be quite loud and some types are also said to be a bit nippy. The Conure parrot species consists of more than 40 different types and they all have their own unique characteristics. There are about a dozen types of Conures that are commonly kept as pets. There are two main types of Conures: Aratinga and Pyrrhura. Pyrrhura Conures are the more popular species of Conure because they are just as beautiful and have the same personality as the Aratinga Conures, but they are smaller, less destructive, and not as loud. Conures, like most smaller parrots, can be very nippy.
Germinal matrix. In anatomy, the germinal matrix is a highly cellular and highly vascularized region in the brain from which cells migrate out during brain development. The germinal matrix is the source of both neurons and glial cells and is most active between 8 and 28 weeks gestation.
Conception is also the beginning of the germinal period of prenatal development. This stage occurs during the first 2 weeks of development (or the 2nd - 4th weeks of pregnancy). The union of the sperm and egg cell forms a single cell called a zygote. The zygote moves along the Fallopian tube toward the uterus.