If we grow embryos past 14 days, we have to face what to do with them once they start looking more human and might feel pain. That’s a door we can’t easily close. I’d rather keep the limit where it is.

The 14-day rule is a clear line we all understand. If we move it, where do we stop? Science might learn things, but I’m not comfortable with embryos becoming lab supplies. I’ll admit you may have a point—I just can’t shake my gut feeling to stay cautious.

Isn't it kind of scary to think about how far we might push things once we move that line? You make a fair point, but I still feel uneasy. I just can't support growing them longer when we don't know the consequences.