Seung nyang was not on her 7-8 month but on her 4 month... (I guess they wrote something like 4 months later...) which would be more coherant with the fact that lady park still didn't give birth (btw - that was suuuuuuuuuuuuper cruel to kill her with this huge belly - I was shocked).
as someone was saying, I felt badly relieved that Nyang is loosing the baby because what would she do with this baby after becoming the emperors concubine ? I don't want additional baby drama in this already heartbreaking story (btw - I am in the Emperor team ;)