I don’t know. But if they were a Christian, I would give them a copy of ‘Too Soon’, this gentle book by author Jane Clamp, now Jane Walters (who herself has lost four babies).
‘Too Soon’ includes 30 empathetic readings from someone who understands, someone who can lead us into God’s Word when we’re at our lowest, and offer simple prayers when we don’t have the words. You can do ‘Too Soon’ as a 30-day devotional, or else just dip into it ‘as and when’.