What is the ruling on aborting a fetus in the seventh or eighth week due to fear that the wife will not be able to enter the country or that separation will occur between the spouses? And what is required as a result, in terms of seeking forgiveness or expiation?

Abortion at seven or eight weeks is forbidden unless there is a confirmed danger to the mother's life. What is mentioned in the question is not a legitimate justification for abortion. The couple must sincerely repent. The 'aqilah (male relatives on the father's side) of the woman who aborted the fetus must pay its blood money, which is one-tenth of her mother's blood money, and she also owes expiation for killing. There is no blood money or expiation on the husband who ordered it, unless he coerced his wife in a legally recognized manner.