Mothers, but not fathers, with multiple children report more fragmented sleep: Study ANI | Updated: Jan 13, 2021 13:03 IST Montreal [Canada], January 13 (ANI): Mothers with multiple children report more fragmented sleep than mothers of a single child, but the number of children in a family doesn't seem to affect the quality of sleep for fathers, according to a study. The study was led by researchers from McGill University. A total of 111 parents (54 couples and 3 mothers of single-parent families) participated in the study published in the Journal of Sleep Research led by McGill doctoral student Samantha Kenny under the supervision of Marie-Helene Pennestri, Assistant Professor in the Department of Educational and Counselling Psychology.