The mean annual incidence was 28.2 per 100,000 pregnancies, demonstrating an increasing trend without statistical significance (annual percentage change: 3.84%; p = 0.094), which corresponded with increasing maternal age.
In our analysis, the APC was 3.84% ( p = 0.094), suggesting a borderline increasing trend that aligns with the rise in maternal age, although the result did not reach statistical significance.
When stratified by maternal age, the incidence of cancer during pregnancy was consistently higher in the advanced maternal age group, but neither group showed a significant trend over time.