To help you decide what type of yarn to use to make this blanket, I've made a few versions of it. The one on top is made using Patons Grace yarn (100% Mercerized Cotton, light (sport) weight) and G-hook (4 mm).
The blanket below is made using Patons Astra (100% Acrylic, light (DK) weight) and G-hook (4 mm).
I worked extra hard on making this pattern as readable and easy as possible. And even though the official skill level for it is intermediate, I've had a beginner crocheter in mind when I was writing the pattern and taking the pictures for it. I understand that not all the mommies and soon-to-be-mommies have advanced crocheting skills, and may still want to make this beautiful blanket.
Here's a sample of one on the pages of the pattern, for you to have an idea about pattern instructions (the quality of the picture below is intentionally poor):
I hope you enjoy this blanket as much as I do!