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Copyright of Ginecología y Obstetricia de México is the property of Federacion Mexicana de Ginecologia y Obstetricia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ginecología y Obstetricia de México is the property of Federacion Mexicana de Ginecologia y Obstetricia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Background: Cervical cancer has been extensively studied, as well as the various risk factors for that cancer. One such factor is the prolonged use of hormonal contraceptives., Objective: To report the biological, immunological and epidemiological findings arising from the use of oral contraceptives and their relation to cervical cancer., Material and Methods: Retrospective study based on information published in national and international literature., Conclusions: Controversy persists between the epidemiological data and experimental biological association between hormonal contraceptives and cancer induced by HPV. It is important to consider the biological findings because in Mexico the use of hormonal contraceptives is very broad and the number of cases of cervical cancer and only extensive epidemiological studies will clarify this controversy.

Introduction: Maternal mortality is a public health issue. The causes of maternal mortality are directly related to accessibility, opportunity, costs and quality of obstetric and perinatal services., Objective: To describe the characteristics of maternal deaths and analyze the risk factors associated with these deaths in the State of Morelos (Mexico)., Material and Method: a cross-sectional epidemiological, observational, descriptive, retrospective study of 94 cases of maternal deaths registered in the Morelos health services, from 2000 to 2004. Hospitalized and non-hospitalized maternal deaths characteristics were compared., Results: Of 94 maternal deaths, 81.9% were classified as hospitalized (66.7% in public hospitals) and 13.8% as non-hospitalized. 73 (77.6%) deaths occurred during the postpartum period. Most women did not have any medical service (76.7%). There were 77 cases (81.9%) of direct maternal death and 12 (18.1%) indirect. The risk of non-hospitalized maternal death in women 35 to 40 years old was three times higher, with incomplete primary education or none 10.9 and without medical service 3.6 times., Conclusions: Most deaths were in hospitals, the main causes were hypertensive disorders of pregnancy, childbirth and postpartum and obstetric hemorrhage, events related to the quality of health services. It is necessary to develop more efficient prenatal programs, with focus in maternal and child risk.

Objective: To determine the prevalence of sexually transmitted infections (STI) among female commercial sex workers in Cuautla, Morelos, Mexico., Material and Methods: A cross-sectional survey was conducted in 1998, in the red-light district of Cuautla, Morelos, Mexico. It included 100 female commercial sex workers who labored permanently in bars and night clubs. Data were collected using two questionnaires, one on socio-demographic characteristics, and the other on commercial sex, risk perception, and knowledge on preventive measures and contagion of sexually transmitted diseases/AIDS. Blood and cervicovaginal specimens were also collected to assess the prevalence of sexually transmitted and reproductive system infections (RSI). Outcome variables were STI (syphilis and chlamydiasis) and RSI (vaginosis and candidiasis)., Results: Sexually transmitted prevalence was of 11%, reproductive system infections prevalence was of 39%. When candidiasis was included in the sexually transmitted infections group, prevalence was of 31%. The main factors associated with sexually transmitted infections were: who instructed on condom use, time having intercourse with partner, and years of commercial sex work. Factors related to reproductive system infections were: illiteracy, use of condom with partner, who instructed on condom use, and years of commercial sex work. Multivariate analysis showed an increased likelihood of acquiring a sexually transmitted infection and/or reproductive system infection with illiteracy, instruction on condom use by a person other than a healthcare worker, and lack of condom use., Conclusions: Regular use of condoms during intercourse is the most important preventive measure to avoid and control STI and RSI. Study findings pinpoint spatial and temporal factors that contribute to infection. Intervention measures directed at these factors should strengthen preventive and educational programs to improve medical care for these infections.