Chronic diseases pose special risk to children, the elderly, but also to pregnant women. During pregnancy they are associated with many complications for pregnant women, fetuses and newborns. They are also connected with the increase of perinatal mortality and morbidity. Women with chronic illnesses should plan pregnancy after getting their illness under control. Planning can provide a birth of a healthy baby without endangering female health and reduce the number of unwanted pregnancies. The average age of primiparas has changed and now is about 35. The increase in the age of primiparas is in positive correlation with incidence of chronic diseases. The main aim of the study was to determine the incidence of chronic diseases in women who gave birth in March and April 2017 in the Republic of Croatia. A specific goal was to find out how women with chronic illness received information on their health condition during their pregnancy. The survey was conducted in March, April and May 2017 by a voluntary online survey, and it was found that out of the 127 respondents, 31 % had chronic illness. The collected data from the questionnaire was entered in the Microsoft Excel table according to the pre-prepared code plan. Descriptive statistics were used. The t-test was used to determine the statistical significance of obtained data differences between the two groups. The highest number of respondents received information about their health and possible influence on their pregnancy from the specialist they were seeing before their pregnancy (N = 69), a selected gynecologist (N = 15), a family physician (N = 14), finding on the internet (N = 14), from other people with the same chronic illness (N = 8) and talking to nurses and other health workers (N = 7).