To ensure a successful session, there are a few things you can do to prepare. Stay hydrated and get plenty of rest leading up to the shoot to help you feel your best. Discuss your vision, preferences, and any specific ideas with your photographer in advance. Additionally, consider bringing props or sentimental items, such as ultrasound images or baby shoes, to incorporate into the photos. Lastly, relax, have fun, and embrace the experience – your genuine joy and excitement will shine through in the images.