Clinical Research Directory

Inclusion Criteria: * 0-28 days after birth; * Single birth; * The gestational age is between 37 and 42 weeks; * Birth weight ranges from 2500 to 4000 grams; * Parents or guardians agree not to allow infants to participate in other interventional clinical studies during the study period Exclusion Criteria: * Artificial assisted reproduction; * The mother suffers from a disease that may endanger intrauterine growth; * The mother suffers from pregnancy diabetes or serious metabolic disease or chronic disease during pregnancy * Suffering from congenital malformations and genetic diseases, chronic diseases, and congenital diseases that may interfere with the investigation; * Suffering from IgE mediated milk protein allergy, or having factors that increase the risk of milk protein allergy; * Suffering from acute infection or gastroenteritis; * Suffering from functional gastrointestinal diseases, such as gastroparesis; * Currently participating in other clinical trials; * Researchers cannot determine whether parents have the willingness or ability to comply with the requirements of the protocol.