When to tell....

Lee • Mommy to 3 year old girl! Baby #2 joining us March 2016!!!
I read online someone (I think it was one of the Duggar children from the 18 and counting show) recently shared their pregnancy very early because she believes life begins at conception and if she miscarries she would mourn it publicly like someone would a "born" child. What do you ladies think? When will you tell?