This study aims to compare the efficacy and safety of 100 mg and 150 mg aspirin in preventing preeclampsia in obese pregnant women and to optimize the LDA strategy for the prevention of preeclampsia. Obese pregnant women at high risk of preeclampsia will be randomly assigned in a 1:1 ratio at 12-16 weeks of gestation. The control group will take 100 mg of aspirin orally every night, while the experimental group will take 150 mg of aspirin orally every night, until 36+0 to 36+6 weeks of gestation. The incidence of preeclampsia will be compared between the two groups.
