This study will be the first to look at the prevalence and consequences of hypothyroidism among a Lebanese population of pregnant women. Estimating the prevalence of hypothyroidism during pregnancy is crucial in order to assess the need for routine TSH screening during pregnancy, in order to be able to manage and improve the outcomes experienced by affected women and their offspring. Pregnant women who had their TSH levels measured during pregnancy will be identified by means of a manual search of the Obstetrics and Gynecology (OBGYN) department’s medical records. Gestational age at the time the maternal thyroid function test(s) was performed will be documented for each patient since trimester-specific reference values will be used to assess thyroid function. In addition, the demographic and clinical information, mentioned below, will be collected for each study subject from the in and the out-patient medical records

Sample of Lebanese women who received antenatal care by Dr. Ghina Ghazeeri at the Women’s Health Center at the American University of Beirut Medical Center, Beirut Lebanon between the years 2006 and 2013 inclusive.

Convenience sampling