When asked at what age music education should begin, Kodály replied, “Nine months before the birth of the mother.”
To learn more about the Kodály method, this article provides a bit of history and background. You should know also that Sister Lorna is one of the early American Kodály teachers.
More information about Sister Lorna's prenatal music program is below. I wasn't able to find published articles about this program, but her work is cited in studies regarding prenatal music.
About Sr. Lorna Zemke
Dr. Zemke is Director of the Kodaly Programs and Director of Graduate Music Studies at Silver Lake College, Manitowoc, WI. An experienced teacher at all levels, Dr. Zemke has taught graduate & undergraduate courses, presented workshops, clinics, demonstrations and lectures throughout the U.S. and abroad for many years. Sr. Lorna initiated a “Music for Tots” program at Silver Lake College, classes for children from birth through age five. The Tots program enrolls approx. 200 children each semester.
In 1986, Dr. Zemke developed the well-known program “Lovenotes: Music for the Unborn” that teaches expectant parents how they can use music as a bonding language with their unborn babies. The “Lovenotes” program was published in English and in Korean. Sr. Lorna Zemke has received outstanding honors for her service and leadership in the field of music education. She has published many articles and books on a variety of topics in music education.