Twins or triplets usually come early; with twins occurring on Father's side of the family, they x-rayed me at seven months on our first child in Alaska...if it had been twins they were going to send me straight to the hospital 60 air miles away until I gave birth. It was a single large female, so they let me remain at the small Air Force Base until I went into natural childbirth...then they rushed me to the bigger hospital. She weighed nine pounds, 10 ounces, and 21 inches long, had dimples in her knees, she was so fat!!
I wish the best for your DDIL...and you need to share pictures back with all of us when they arrive. At least, through Carrie and maybe she will update all of us.