Statement about aspirin
Due to the lack of consensus in using LDA for twin pregnancies, the two
centers participated in this study carried out different policies on
aspirin use for twin pregnancies and thus made this observational study
feasible. Given that the specification of aspirin tablets in China is
either 25mg or 100mg, and ACOG recommendation for pregnant women is 81mg
daily, therefore, 100mg/d was prescribed to participants to avoid under
dosage.