RESUMEN
Although pregnancy is a biologically normal phenomenon, it is an exceptional event in the life of a woman and her family and, as such, requires a deviation in the organization of values and function. Thus, the aim in developing this system is to provide a supporting tool for students, pregnant women, and obstetrical professors in this situation. The objectives are the following: to demonstrate the several stages of normal pregnancy and to demonstrate the modifications occurring in the maternal body during normal pregnancy. The second trimester of pregnancy has been described as the time when most women seek prenatal care and read books and attend talks about pregnant women in order to receive explanations for the events that are occurring in their bodies. We believe that at this moment, access to software with information on the formation and development of the fetus and the physiologic modifications occurring in the maternal body would be of great help to the family. The system will show, with pictures and text, the global phases in pregnancy, such as: fertilization (gamete fusion, formation of the ovum, nidation, blastulation, gastrulation); formation of embryonic assessors; smooth and shaggy chorion; amniotic and allantoic vesicle; placentogenesis; development of the embryo; maternal circulation; morphological and physiological development of the fetus; anatomical and physiological adaptations and modifications of the maternal body. The method was done with the review in the current literature and to raise audiovisual resources on the issue. The software is being developing using multimedia techniques. We are using the ToolBook software to be run in Windows environment. In view of the above, the elaboration of this software, still nonexistent in Brazil, becomes indispensable and useful for our students, health professionals, and women in general.