Friend who lost her baby, advice please.

Lauren • 30, Married, Dog Mom, first baby on the way! EDD March 8, 2016
One of my good friends delivered her son two weeks ago and sadly, he passed minutes after birth due to developmental complications where his trachea didn't form. 
I am 4 weeks postpartum and her loss especially hits home with me. I'm struggling to know how to support her and even what to say. I've dropped off food at her house and have reached out over the phone letting her know we are uplifting her in prayer. 
I'd like some advice from those who have experienced something similar on how to support my friend. I just simply don't know what to say or do. 
Thank you ❤️