Lifestyle Intervention to Improve Twin Pregnancy Outcomes

Inclusion Criteria: * Prior to any randomization or intervention, participants must have provided voluntary written informed consent. * Diagnosis of dichorionic twin pregnancies must align with the acceptance criteria. * Participants must be recruited before the 14th week of gestation. * Proficiency in Dutch, English, or French is required.- Exclusion Criteria: * Participant has a history of pre-existing diseases or condition impacting their diet: 1. pre-gestational diabetes 2. severe heart disease, 3. chronic renal disease, 4. celiac disease, 5. inflammatory bowel disease, 6. post-bariatric surgery * Participant has a history of pre-existing diseases or conditions impacting their physical activity ability: 1. Chronic Obstructive Pulmonary Disease (COPD) 2. Severe Asthma. 3. Fibromyalgia 4. Osteoarthritis 5. Chronic Pain Syndromes 6. Spinal Cord Injuries. 7. Multiple Sclerosis (MS) 8. Parkinson's Disease 9. History of a Stroke 10. Drug resistance Epilepsy * Participants identified with mental vulnerabilities requiring specific care pathways by Born in Belgium (BIB) or local screening tool. * Participants with a History of Mental Health Disorders 1. Post-Traumatic Stress Disorder (PTSD) 2. Anxiety Disorders 3. Depressive Disorders 4. Bipolar Disorder 5. Obsessive-Compulsive Disorder (OCD) 6. Schizophrenia or schizoaffective disorder * Inability to give informed consent * No knowledge of Dutch, English or French * First trimester diagnosis of severe congenital anomaly in one or both twins * First trimester foetal demise of one or both twins * Rupture of membranes prior to recruitment * Participation in any other interventional Study