title: Changes in hemoglobin concentration and hematocrit during the menstrual cycle. I. A cross-sectional study.
mesh_terms: D000328:Adult; D004912:Erythrocytes / Q000378:metabolism; D005260:Female; D006400:Hematocrit; D006454:Hemoglobins / Q000378:metabolism*; D006801:Humans; D008598:Menstruation; D010060:Ovulation; D013997:Time Factors
chemical_list: D006454:Hemoglobins