Ibn al-Musayyib (may Allah have mercy on him) says that the Prophet (peace and blessings be upon him) ruled concerning a fetus that is killed while still in the womb that a male or female slave be given. The one against whom he had ruled said: "How can there be blood money for one who neither cried out nor screamed?" So he (peace and blessings be upon him) said: "This one is a brother of the soothsayers."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / 16407