2 IntroductionThyroid diseases are among the most common endocrine diseases in young women. Uncomplicated thyroid disease should have little effect on the pregnancy, however this condition is an indication for Consultant-led care in pregnancy.At booking, there should be an agreed plan of care, which should be documented clearly in the hospital and hand-held notes and reviewed as appropriate, as the majority of the woman’s care will subsequently take place in the community setting.