Is a mother's supplication against her fetus during pregnancy considered a sin that necessitates expiation after the child's death?

A Muslim must be patient during circumstances he dislikes. Offspring are a great blessing, and it is not permissible to curse them with destruction. The Prophet, peace and blessings be upon him, forbade cursing children. A mother's curse against her fetus might be answered or it might not. If the curse was uttered during a moment of intense anger, and the mother did not intend what she said, then it will not be answered. However, if she cursed intentionally and by choice, the supplication might coincide with a moment of acceptance. The mother must seek forgiveness, repent, and not return to such supplications.