Is Sub-Clinical Hypothyroidism in Pregnancy Really Sub-Clinical?

By definition, sub-clinical implies that something is “not” causing any noticeable symptoms. Thus the name “sub-clinical hypothyroidism” assumes that a lower than expected thyroid function causes no problems for an individual person in that category.  In reality, a “sub-clinical” state stands out as more of a burglar in a pitch black room.  Just because we do not immediately “see” the burglar does not mean he or she cannot harm us.