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Heterotopic pregnancy is of very rare presentation, usually with tubal location and exceptionally cervical, constituting a challenge for the obstetrician and gynecologist. A nulliparous 45 year-old patient presented a heterotopic cervical pregnancy. She had been subjected to assisted reproductive techniques. Clinically, there was only scarce vaginal bleeding. Ultrasound at 9 weeks of gestation showed double gestational sac, one located in the endocervix, and both fetuses alive. Treatment options were curettage and placement of intra-cervical balloon, embryo-reduction with potassium chloride, and hysterectomy; the patient decided a single elective hysterectomy. Pathology confirmed the diagnosis.

The basic objective of this research was to conduct psychometric adaptation of the Spanish version of the Aggression Questionnaire (Buss and Perry, 1992; Andreu, Peña and Grana, 2002). It was worked with 3,632 from 10 to 16 years, of both sexes, of 1 º to 5 º degree of secondary education, fromdifferent educational institutions of the coast, highlands and jungle of Peru. This study analyzes the structure of the questionnaire through exploratory factor analysis evidencing the model proposed by Buss and determines acceptable internal consistency. The results obtained show an acceptable fit to the four-factor model, adequate internal consistency, scales percentile and interpretative rules.

The basic objective of this research was to conduct psychometric adaptation of the Spanish version of the Aggression Questionnaire (Buss and Perry, 1992; Andreu, Peña and Grana, 2002). It was worked with 3,632 from 10 to 16 years, of both sexes, of 1 º to 5 º degree of secondary education, fromdifferent educational institutions of the coast, highlands and jungle of Peru. This study analyzes the structure of the questionnaire through exploratory factor analysis evidencing the model proposed by Buss and determines acceptable internal consistency. The results obtained show an acceptable fit to the four-factor model, adequate internal consistency, scales percentile and interpretative rules.