title: The cost of reproduction-a physiological approach.
mesh_terms: D000222:Adaptation, Physiological; D000818:Animals; D005075:Biological Evolution; D004463:Ecology; D004734:Energy Metabolism; D005298:Fertility; D005399:Fishes / Q000502:physiology; D007448:Invertebrates / Q000502:physiology; D008136:Longevity; D010271:Parasites / Q000502:physiology; D018521:Plant Physiological Phenomena; D012098:Reproduction; D014714:Vertebrates / Q000502:physiology