Many studies have been carried out on quality of life utilizing different instruments; however, no study has been developed on the quality of life of a woman during pregnancy in Brazil. This study is the first on quality of life during pregancy with the specific objective of measuring quality of life for low income  pregnant women. The sample comprised of 89 women who participated in a health promotion group during the period between January and September 2005, and who responded to the Ferrans & Powers Quality of Life Index adapted by the authors. The results show that the pregnant women live , subsisting on U$4.1dollars per day. 36% were adolescents and 64% were over the age of 18, 45% were pregnant for the first time, 24% already had one child and 31% had two or more, 100% were without fixed employment. Their quality of life index was relatively high, both on the sum total and by heading, with the exception of Socioeconomics. When subjected to comparative statistical analyses between headings there was a significant difference. The heading of Family presented the largest score on quality of life, followed by the headings Psychological/Spiritual and Health / Ability to function, leaving Socioeconomic with the lowest score. In relation to a specific trimester of gestation there was no significant statistical difference to the general quality of life score, neither was there a difference by headings, in summary, the sample population presented the same scores on quality of life regardless of the pregancy trimester, although pre-natal care was considered very important for 91% of the women. One must conclude that there was no significant difference in quality of life between the different trimesters of their pregnancies.