On a news article on Soompi, July 22, it was reported that Lee Young-ae, who we know as Jang-geum, is pregnant! It was kept a secret until her father said something. Don't believe me? Here's the source:
From Dae Jang-geum: Sun-dol: "Are you trying to dry me up and kill me? Why do you say the same things over and over every day? Rather, come and hit me once! Aigu!" But then: Dr. Lazarus: "By Grabthar's hammer, by the suns of Warvan... You shall be avenged."