A:
It is Wajib (obligatory) for the concerned lady to offer the Kaffarah because she caused the death of the baby.
The Kaffarah of involuntary manslaughter is to free a believing slave or, if that person is unable to do, to observe Sawm (Fast) for two successive months, i.e. sixty days. If the lady in question is unable to offer the Kaffarah, she will be responsible to offer it once she is able to do so. (Part No. 21; Page No. 362) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.