Just a random musing, most people say having baby can save a failing relationship. I have never been able to understand this. Is it true, does that work?

Well, it really depends. I do not think a baby should be a pawn to the marriage (i.e. using the baby to see if the marriage is strengthened). In the first place, if the couple has distanced from each other, it means there is a lack of communication and a baby is just going to add to the mess. A baby does bring joy and happiness, but both parties have to first be able to stand up the responsibility of having a baby, PLUS it would be a blessing for the baby to be born to parents with a strong relationship, and a misfortune should the relationship worsen due to the birth of the baby. Therefore, the couple should first go for couples counselling to iron out their problems and save their relationship before considering a baby.