sikiökehitystä
Sikiökehitys, or fetal development, refers to the stage of prenatal development following the embryonic period and preceding birth. In humans, this period typically begins around the ninth week of gestation and continues until delivery. During this phase, the developing organism, now called a fetus, undergoes significant growth and maturation of its organs and systems, which were largely formed during the embryonic stage.
The fetal period is characterized by rapid increase in size and weight. Major organ systems continue to
Towards the end of the fetal period, the fetus gains significant body fat, which is crucial for