Description from Knitty.com:

The high empire waist, low v-neck and a-line shape so common to maternity wear are brought together here in a light wool/cotton blend, perfect for the season. The delicious red yarn conveys the ripe fullness promised by both spring and pregnancy. The a-line shape and ribbing are repeated in the bell sleeves, but this sweater would make a great tank as well. Just knit the armhole openings a half inch shorter and finish them off with a simple crochet edging