WHY IS THE FUR OF UNBORN LAMB considered especially disturbing?

“That’s just a little too much,” said the designer Carmen Marc Valvo, explaining why he draws the line at using fetal lambs…

I love the use of the word “explaining” here. What’s explanatory about “too much”? Is there some connection to the sensitivity about fetuses caused by the abortion debate? Because that really wouldn’t make any sense at all.