Fósturþroskun

Fósturþroskun refers to the complex process of development that occurs from conception until birth. This period is characterized by rapid cell division, differentiation, and the formation of all the body's organs and systems. It is generally divided into two main stages: the embryonic period and the fetal period.

The embryonic period, lasting from fertilization until about the eighth week of gestation, is a time of significant structural development. During this stage, the basic blueprint of the body is established, including the nervous system, heart, limbs, and facial features. Major organs begin to form and take shape.

Following the embryonic period, the fetal period begins around the ninth week and continues until birth. This stage is characterized by growth and maturation of the already formed organs and tissues. The fetus gains weight, its bones harden, and its sensory organs become more developed. For instance, the fetus begins to hear sounds from the outside world and can move its limbs. This period is crucial for refining the structures formed during the embryonic stage, preparing the developing human for life outside the womb. The entire process is highly regulated and influenced by genetic factors and the maternal environment.