A lot of people, Including myself have theorized that Cersei (Lannister) will have a miscarriage. I speculated that this would happen at the end of Season 7 do to fright from seeing a wight "in the flesh", so to speak...NOW what I think is the most likely scenario... its Qyburn's fault (indirectly). Let me explain my thinking. Qyburn provided the poison, called "The Long Farewell" and antidote Cersei used on Tyene Sand (Ellaria Sand's daughter) But...