She overexerted herself in her house and had a miscarriage; does she have to offer expiation?

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She allowed her son to go the mosque and he drowned in a hole in the valley and died
She did not have any milk in her breasts so she fed her baby girl butter and she died

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Related Answers:
What should a woman who deliberately aborts her foetus do (to expiate for her sin)?
He left his little boy in the house on his own, and the stove fell on him and he died
The girl took some pills from her mother’s pocket and swallowed them
She allowed her son to go the mosque and he drowned in a hole in the valley and died
She did not have any milk in her breasts so she fed her baby girl butter and she died

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