Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answer updated 3 years ago

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.