A "feto" refers to a developing human from approximately the ninth week of pregnancy until birth. During this stage, the fetus undergoes significant growth and development, including the formation of organs, limbs, and facial features. This period is crucial for the overall health and viability of the baby. The term "feto" is derived from the Latin word "fetus," which means "offspring" or "young one." It is important to monitor the health of the fetus through regular check-ups and ultrasounds, ensuring proper development and addressing any potential issues that may arise during pregnancy.