Menarche, Late (Start of Periods): definition Posted by: Cleo Libonati, RN, BSN in DICTIONARY 0 2,482 Views A menstrual disorder in girls characterized by abnormal delay of menstruation (periods) that is a symptom of celiac disease involving deficiencies of omega-6 fatty acids and cholesterol, features of malnutrition. Click for full description. Female Reproduction Glossary. Late Menarche Low Cholesterol Malabsorption Malnutrition Menstruation Omega-6 Fatty Acid Deficiency 2013-04-12 Cleo Libonati, RN, BSN