[fetal heart beats by 21st day]

Fritzl probably made the older boy stay in the dungeon as a threat to Elizabeth.

[mel]

How do you figure that?
I read somewhere that he didn’t want the crybabies.
it is even amazing, he didn’t just take them and dump them somewhere.

[wideminded]

There were only three total children in the dungeon. The story describes them all being brought to the hospital by Fritzl.