2.1. Research object
mental disorders or cognitive disorders, hearing or vision impairment
DISEASES
Convenient sampling was used to select a total of 300 pregnant women who planned to undergo interventional prenatal diagnosis at the prenatal diagnosis center of a tertiary first-class hospital in Sichuan Province from the April 2020 to the January 2021, among which 150 pregnant women were randomly selected as control group who planned to undergo interventional prenatal diagnosis from the April 2020 to the August 2020 by the random number method. The rest 150 people who were about to take interventional prenatal diagnosis from the September 2020 to the January 2021 served as experimental group.Inclusion criteria: ① Meeting the guidelines for prenatal diagnosis; ② the first time of undergoing interventional prenatal diagnosis; ③ volunteering in the study and signing the informed consent form; ④ people with self-behavior ability. Exclusion criteria: ① people with mental disorders or cognitive disorders related diseases; ② people with hearing or vision impairment; ③ unable to communicate normally. Rejection criteria: ① withdrawing from the research during the study period; ② people who have poor compliance and fail to complete the research in accordance by the intervention plan; ③ providing invalid information.