Main findings
In the present study, there was a higher incidence of PTB, pPROM, and GH among pregnant women with uterine myomas than that among the control group. However, there was no significant association between uterine myomas during pregnancy and II. In addition, II was not associated with increased risk of PTB and pPROM in women with uterine myomas, contrary to the results in the general population. This suggests that PTB may be induced by mechanical factors in women with uterine myomas, rather than by II.