Why are some babies called rainbow babies?

Question

Why are some babies called rainbow babies? What does the rainbow imply?

Answer

After a miscarriage they say it as a after a storm there’s a Rainbow

Answer

My daughter is my rainbow because she was concieved after a very bad storm ( Loss of my son ) 
Any baby born after a miscarriage, stillbirth or infant loss is a rainbow baby.

Answer

Homosexual blessing 
Idunno I guess it’s like the bible because of the flood and storms and the rainbow after it and that’s what pregnancy is like so their child is the little rainbow

Why are some babies called rainbow babies?

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