When already pregnant women arrived at the camps, they would directly be murdered in the gas chambers, since the Nazi wanted to eliminate the non aryan race.

But even if they managed to hide their pregnancy, the newborns were killed by injection or drowning. If the women wanted to save their own lives, they would have to kill them themselves.

Josef Mengele was a doctor in the camp Auschwitz, and he is known because of experimenting with human bodies.

A pair of twins that arrived at camp were selected because they had "the perfect aryal features" (So light eyes, blonde hair, fair skin...) He wanted to know how twins are created, so that double the aryal babies would be born.

In order to do these experiments, he removed organs without anesthesia, or he would also try stitching the twins together.

He was never caught, as he ran away without consequences.