For maternity, I recommend aiming to have your session between 27-35 weeks of pregnancy, aiming for weeks 30-32 if possible. There are also some exceptions which you can read about here. I recommend booking at least 4-6 weeks in advance to secure your preferred date and allow for sufficient planning time. For newborns, I recommend having the session between 3 to 15 days after birth. I include a buffer for flexibility with your booking, so booking as soon as you know your due date will help ensure your preferred dates.