Sometimes the baby arrives early and before the scheduled photo shoot.
Sometimes the baby arrives before their due date and scheduled photo shoot.
予定日が早まって撮影前に産まれてしまう人もいる
Sometimes the baby arrives early and before the scheduled photo shoot.
Sometimes the baby arrives before their due date and scheduled photo shoot.
予定日が早まってを予定日より早く生まれてと解釈しましたので、arrive early、born before their due dateと訳しました。