The great Catholic group Women for Faith & Family has resources (click on this post's title) for observing the Feast of the Holy Innocents, including a Novena for Protection of the Unborn.
Did you know that the Holy Innocents Reparation Committee used to hold a big pro-life candlelight march in the heart of Hollywood on the evening of every December 28, and movie stars such as Ricardo Montalban and Ann Blyth used to lead decades of the Rosary at Blessed Sacrament Church after the march? God bless everyone who took part.
By the way, Women for Faith & Family is my source for the painting above, Giotto's Massacre of the Innocents (1304-1306). Pro-lifers will notice that the pile of slain babies in Giotto's 700-year-old painting closely resembles today's actual photos of aborted babies.