What are 5 characteristics of an alive fetus?

An alive fetus typically exhibits the following characteristics: a detectable heartbeat, which can usually be seen via ultrasound; movement, as early as around 7-8 weeks gestation; growth, indicated by increasing size and development of organs; the presence of amniotic fluid, which cushions and protects the fetus; and responses to stimuli, such as reacting to sound or light. These signs collectively indicate that the fetus is developing normally and is alive.