Management of pregnancy in women with diabetes remains challenging. There is evidence Preparedness for pregnancy through pre-pregnancy counselling increases the probability of a healthy pregnancy, but for a variety of reasons uptake is consistently low, with attendance rates being less than 30% in most reports. Women with low health literacy may in particular be less likely to plan their pregnancy or talk to a health care professional before pregnancy. There is also evidence women with type 2 diabetes, younger women and those with previous pregnancies may be less likely to attend pre-pregnancy counselling. We are developing a survey tool to provide insights into Preparedness for Pregnancy. Based on the outcomes of our prior qualitative study which developed a model of the journey of pregnancy for women with type 1 diabetes and an extensive literature review, we postulate women will be more likely to maintain desirable health behaviours before and during pregnancy, if they have a higher level of Preparedness before planning pregnancy. The tool is intended to be used by health care professionals with women with pre-existing diabetes and encourage a person-centred approach. We created an initial pool of potential themes and items based on the prior study, which after discussion was reduced to 40. An expert panel was selected to represent consumers and content experts and this resulted in reduction of the items from 40 to 30, and a change of language on some. The latter are contained within 2 domains we believe equate to Preparedness: 1) knowledge of desirable health-related behaviours for the pregnancy journey, and the importance placed on these by the woman; and the personal, social and emotional resources available for the journey. A Likert scale is used for response items. The tool has been developed into an online survey to test Reliability and Validity.