Objective: To examine potential associations between the presence of fibroids and obstetric outcomes in twin
pregnancies. Methods: A prospective cohort study compared obstetric outcomes between individuals with
twin pregnancies who did and did not have fibroids. Patients were considered for inclusion if they underwent
first-trimester ultrasonography examination, and went on to deliver at the Beijing Obstetrics and Gynecology
Hospital between September 1, 2012 and December 31, 2014. Participants were grouped based on the presence
or absence of fibroids and baseline demographics, fibroid characteristics, and obstetric outcomes were recorded
and compared between the two groups. Results: In total, 153 patients with twin pregnancies were recruited; 51
had fibroids and 102 did not. Patients in the fibroid group demonstrated a highermaternal age (P b 0.001), higher
pre-pregnancy bodymass index (P=0.01), and higher rate of assisted reproductive technology use (P=0.04).
The presence of fibroidswas not associatedwith any change in obstetric outcomes, and obstetric outcomeswere
unaffected by the number, size, location, and type of fibroids (all P N 0.05). Conclusion: Fibroids were not a risk
factor for any adverse obstetric outcomes among patients with twin pregnancies