Is in vitro fertilization associated with preeclampsia? A propensity score matched study

Area of Science:

• Reproductive Medicine
• Obstetrics
• Perinatal Health

Background:

• Preeclampsia risk in pregnancies conceived by in vitro fertilization (IVF) has been suggested but not definitively established.
• Investigating the direct association between IVF and preeclampsia is crucial for understanding pregnancy outcomes.

Purpose of the Study:

• To investigate the association between in vitro fertilization (IVF) and the onset of preeclampsia in pregnant women.
• To determine if IVF is an independent risk factor for preeclampsia using propensity score matching.

Main Methods:

• A cohort of 3,084 pregnant women was analyzed, with 474 conceived via IVF and 2,610 conceived naturally.
• Propensity score matching was employed using 27 maternal and paternal variables to control for confounding factors.
• The association between IVF and preeclampsia was assessed in the matched sample (N=474).

Main Results:

• Preeclampsia occurred in 3.2% of the IVF group versus 1.2% in the non-IVF group before matching.
• Unadjusted and adjusted analyses indicated a higher likelihood of preeclampsia in the IVF group.
• After propensity score matching, the association between IVF and preeclampsia was no longer statistically significant (OR: 2.50, 95% CI: 0.49-12.89).

Conclusions:

• Propensity score matching reduced the apparent association between IVF and preeclampsia.
• The findings suggest that residual unmeasured factors may confound the relationship between IVF and preeclampsia.
• Further research is needed to elucidate the complex interplay of factors influencing preeclampsia in IVF pregnancies.