Figure 2. Adjusted risk ratios of ischemic placental disease and its components in first donor IVF singleton pregnancies by thresholds of initial βhCG.

Note: Data presented as risk ratio and 95% CI. Adjusted for maternal age, parity, and embryo age at time of initial βhCG with the exception of donor preeclampsia, which was adjusted for maternal age and parity due to convergence issues. IPD: ischemic placental disease; SGA: small for gestational age.

0-150 (n=61), 151-300 (n=103), 301-450 (n=38).