Of them, about 50% is estimated at carrier’s silent calculations. It is difficult to know for certain this proportion, because there are disorders gastrointestinal and urinary tract that can cause confusion as to the origin of abdominal symptoms in pregnancy. Undoubtedly, vesicular lithiasis is a usual pathology that affects women three to four times more than the man and one of the known predisposing factors is pregnancy, because bile that forms is thicker and, therefore, more litogenica7, 8, 12. MATERIAL and methods the study was conducted in the service of diagnosis by images of the Virgin clinic of the pillar of the city of Trujillo, Peru. Included 292 pregnant women at different stages of the gestation, in which, in addition to evaluating the characteristics of the pregnancy, the gallbladder was studied. The research was conducted in two times. The first part examined 60 consecutive patients, between June 24 and September 9 in the year 2000; in the second part were examined 60 patients, between June 2 and September 15 in the year 2001.

All the studies were conducted with a team of ultrasound Medisson 5000 Sonoet brand, with 3-5 Mhz of real-time convex transducer. Asked the patients that they come to study in six hours fasting. The obstetric examination was performed according to the Protocol that is followed in the service of diagnostic imaging, which includes, inter alia, assessment of the skull, neural arch and morphological characteristics of the fetus, biparietal diagnosis, length of the femur, heart, abdomen, amniotic, placenta. Once completed the obstetric evaluation, exploration spread the gallbladder in whose study is reversed in two or three minutes maximum. It must be noted that at the request of the treating physician, not intentionally sought the presence of vesicular disease and most of the patients were asymptomatic. Figure 1. Gestation in studied population (n = 120) results the average age of the patients was 27.