Cervical decidual reaction in pregnancy is a common finding. In rare cases, these changes can mimic the appearance of invasive cervical cancers. We are presenting a case of a pregnant woman with a large cervical mass. Whilst magnetic resonance imaging (MRI) supported a diagnosis of cervical cancer, cervical tissue biopsies showed decidual reaction and no invasion. Cervical appearance postpartum reverted back to normal. Importantly, cervical biopsies were obtained in a fully equipped theatre attended by multiple specialities in case of life-threatening haemorrhage during pregnancy.