What is the Church's teaching on using birth control for genetic conditions?

I am pro life, against artificial birth control, etc. However, in the case of a family with a serious, fatal genetic illness which is 50% likely to be passed on to a child, what options are open to them to prevent pregnancy? I feel like the husband should have a vasectomy (he is the one who will pass it on.) They are not Catholic. I don’t want to sin in my advice.

CatholicDDOB,

The following links should assist you in better understanding the Catholic Church’s teaching on using birth control medication for medical reasons. If you have any further questions or concerns that are not answered by these links, please contact Catholic Answers directly.

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