Various types of in vivo studies are conducted to assess different aspects of toxicity: - Acute Toxicity Studies: These evaluate the immediate effects of a substance following a single exposure. - Subacute and Subchronic Toxicity Studies: These assess the effects of repeated exposure over a period of a few weeks to several months. - Chronic Toxicity Studies: These long-term studies, often lasting for a significant portion of the organism's lifespan, assess the potential for chronic health effects. - Carcinogenicity Studies: These are designed to determine if a substance has the potential to cause cancer. - Reproductive and Developmental Toxicity Studies: These evaluate the effects of a substance on reproductive health and the development of offspring.