At Birth
If you can believe this, the twins actually had another ligament at birth. Yes, they had an arm protruding from their necks. Doctors surgically removed the arm, so that only a shoulder blade was left.

At Birth
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If you can believe this, the twins actually had another ligament at birth. Yes, they had an arm protruding from their necks. Doctors surgically removed the arm, so that only a shoulder blade was left.

At Birth