I think the doctor said there were low chances to have another one if I remember correctly
Just like in real life, there are couples who have difficulty getting pregnant and they are told that the chance of pregnancy is unlikely. that does not mean that they cannot get pregnant. So due to different circumstances, it can happen to get pregnant anyway.
The doctor only said his uterus shrunk really bad/shrunk bcs it got damaged after not getting enough postnatal (?) postpartum (?) care so there were little chance of having another baby. That's why it took so long before they had Luna, his uterus might've healed after a long time of treatment, plus he's pretty young so recovery is faster.
I love how informative u people r
In the main story I faintly remember during his pregnancy with byul the dr said something abt him not being able to have kids anymore and this pregnancy was kinda a one off fluke. I remember this cuz he said that means we dont have to use condoms anymore. So how in the helly do they have another kid now???? Am I missing something