Effect of implementation of a preconception counselling resource for women with diabetes: A population based study.

•Pregnancy planning and pre-pregnancy care uptake is poor among women with diabetes.•Poor preconception counselling is linked to poor pre-pregnancy care uptake.•Implementation of a preconception counselling resource improved pregnancy planning.•Women who engaged with the resource were better prepared for pregnancy.•Women with type 2 diabetes, typically cared for in primary care, are hard to reach.