Christian doctrine somehow thriving without turning to ridicule (6,5)

I believe the answer is:

virgin birth

I'm a little stuck... Click here to teach me more about this clue!

'christian doctrine' is the definition.
'Virgin Birth' can be an answer for 'doctrine' (Virgin Birth is an example). I'm unsure of the 'christian' bit.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for virgin birth that I've seen before include "Result of immaculate conception?" , "What follows from Immaculate Conception" .)

I've seen this clue in The Times.

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