A fetus or foetus (; plural fetuses, feti, foetuses or foeti) is the unborn offspring of an animal that develops from an embryo. Following embryonic development the fetal stage of development takes place. In human prenatal development, fetal development begins from the ninth week after fertilisation (or eleventh week gestational age) and continues until birth.
It is not called Kaffara but Diyyah. Diyyah is a penalty on the person who kills or injures someone else. It goes to the inheritors of the victim who did not take part in the sinful act itself (abortion).
Deliberate terminating of pregnancy is a sinful act. The Diyyah depends on the age of the embryo. In your case of 11 weeks , the Diyyah is two hundred and ten Mithqal of silver. Every Mithqal is 4.64 grams.
It is not called Kaffara but Diyyah.
For deliberately aborting of 11 weeks embryo, the Diyyah is 210 Mithqal of silver. Every Mithqal is 4.64 grams.
The Diyyah or its value must be given to the inheritors of the embryo who did not take part in the act of abortion.