We're sharing the best summer pregnancy announcement ideas using a letterboard sign to help you create special digital pictures for social media and family keepsakes. Whether it's your first baby, baby 2, or beyond, we've got you covered with precious ways to reveal your big news to family, to parents, or to husband, including photos with a sibling holding a letterboard, letterboards on the beach, and more. Don't miss these creative and unique summer baby announcement photoshoot ideas for…