Responses

Spoiler
If I remember it correctly, in the novel, a couple months before labor he had to be hospitalized and stay in the hospital care because of the drugs/medication he took and all the stress/condition of his body.
He didn't get to look after the baby after labor and had to wait a while before seeing his own baby.
Yeonwoo is pregnant, it's bad that he's always stressed. Take carw of each other!