baby head support pillow prevent flat head plagiocephaly

http://emilianohloy488.over-blog.com/2019/08/how-to-solve-issues-with-baby-doughnut-pillow.html

The newborn loves the pillow. She appears pretty comfortable sleeping on it. Are using the pillow for a month and noticed a person a very slight improvement from the flat head . Possibly this pillow is best for