Emily Rapp has written a heartbreaking piece for Slate about her profoundly-disabled, terminally-ill child:

This week my son turned blue, and for 30 terrifying seconds, stopped breathing. Called an "apnea seizure," this is one stage in the progression of Tay-Sachs, the genetic disease Ronan was born with and will die of, but not before he suffers from these and other kinds of seizures and is finally plunged into a completely vegetative state. Nearly two years old, he is already blind, paralyzed, and increasingly nonresponsive. I expect his death to happen this year, and this week's seizure only highlighted the fact that it could happen at any moment—while I'm at work, at the hair salon, at the grocery store. I love my son more than any person in the world and his life is of utmost value to me. I don't regret a single minute of this parenting journey, even though I wake up every morning with my heart breaking, feeling the impending dread of his imminent death. This is one set of absolute truths.

Here's another: If I had known Ronan had Tay-Sachs (I met with two genetic counselors and had every standard prenatal test available to me, including the one for Tay-Sachs, which did not detect my rare mutation, and therefore I waived the test at my CVS procedure), I would have found out what the disease meant for my then unborn child; I would have talked to parents who are raising (and burying) children with this disease, and then I would have had an abortion.

Go read the whole thing.