Influence of health care information on reproductive decisions

The aim of this trial is to test and evaluate the impact of co-designed, evidence-based information about the anti-mullerian hormone (AMH) test on women's attitudes, interest in the test, psychosocial outcomes and reproductive decision-making. The intervention materials (evidence-based information about the AMH test) have been co-designed with a number of clinicians (IVF specialists, GPs, gynaecologists) and women (whom are the target audience of AMH test marketing). Participants will be randomised to 1 of 2 conditions; the intervention or the control arm. The intervention arm will present women with co-designed, evidence-based information about the AMH blood test. Participants will be randomised to either the intervention or control using Qualtrics survey software. After viewing the information presented in an online, written format (soft-copy written materials with matching images), participants will complete several outcome measures. It is anticipated it will take approximately 5-10 minutes to view the intervention materials, plus a further 5-10 minutes to complete the outcome measures. Detailed description of intervention materials: A co-designed, evidence-based information guide on the AMH blood test, concerning the nature of the test and its poor predictive value when it comes to predicting current or future fertility, as well as premature ovarian failure or age of menopause. It will also elaborate, with evidence-based information, on the following subjects: Who might benefit from an AMH-test; Risks and downsides of taking the test; costs of the test (appropriated to the country for which the guide is made); And information on preconception health and where to seek more information.