[Epidemiology of congenital hypothyroidism in Mexico].

Objective: To describe the epidemiological characteristics of congenital hypothyroidism (CH) in newborns (NB) detected by the Ministry of Health of Mexico (SSA).

Material And Methods: A cross-sectional study was conducted. Thyroid stimulating hormone (TSH) was quantified in 1,379,717 blood samples of NB (from umbilical cord or heel prick), collected in Guthrie cards, between January 2001 and December 2002, in medical units of the SSA.

[Hyperthyrotropinemia in Mexican newborns].

Objective: To assess the differences in the blood concentration levels of the thyroid stimulating hormone and their possible use as an indicator of iodine sufficiency, in a sample of Mexican newborns.

Material And Methods: A cross-sectional study was conducted from September 1999 to August 2000, among 25,427 Mexican newborns in the Ministry of Health clinics from 5 states. A total of 8,095 heel-prick and 17,332 umbilical cord blood samples were analyzed.