[Somatometry in full-term newborns in Villahermosa, Tabasco, Mexico. Study of a middle-class population].

OBJECTIVE: Realize a somatometric study in the Tabasco zone and compared this results with a similar study.

DESIGN: Full term newborns without patology take weight, height and head circumference.

SETTING: In Villahermosa City, Capital of Tabasco State in México, from march 1, 1988 to january 31, 1989.

SUBJECT: 915 fullterm newborn, male 450, female 465, from the patients of Instituto Mexicano del Seguro Social (Social Security System).

RESULTS: The average weight in male was 3,290 g, with standard deviation (SD) 358 g, in female 3,130, SD 343 g (P less than 0.01); height in male 50.2, SD 1.3 cm, female 49.8, SD 1.3 cm (P less than 0.01); head circumference in male 34.7, SD 1.5 cm, female 34.5 SD 1.5 cm (P: without significance). We make our own percentiles.

CONCLUSION: We found stadistic significance between both sexes; we don't found between another study; when we compared our work with others in past decades, observed the improved obtained by the people in our country.