Supported by science and the positivist ideal of considering true knowledge, medical surveillance of the body (Foucault, 1982) makes other sources of knowledge unreliable and potentially dangerous, creating a dependence on medicine and technology (Armstrong, 1987). Zechmeister (2001) describes this and the third dimension of power. Where it becomes possible to get people to conform or accept control by shaping their wants or needs. Societal trust in ultrasound technology and the medical system can therefore function as a powerful control mechanism, devaluing a woman's innate, felt knowledge and causing women to rely more on technology and medicine to gain their own “true” knowledge. ” recognized. pregnancies (Davis-Floyd, 1994). A woman's knowledge is seen as subjective and unreliable, she must conform and access the legitimate knowledge of the professional and technology to be reassured about her pregnancy and the health of her baby (Davis-Floyd, 1994; Draper, 2004). A coercive element then begins to manifest itself when women are admonished for questioning their care or going against socially accepted norms (Pearse, 1998; Baille & Mason, 1997). Zechmeister (2001) and Verbeek (2011) also explain that these values ​​tend to direct the development of new technologies towards an expansion of control and monitoring by doctors and less towards the actual improvement of the health of mothers and, consequently, of unborn children. This monitoring and reliance on medicine also creates the possibility that the focus of prenatal care shifts from the care of the woman to the technical surveillance of her pregnancy (Zechmeister, 2001). The pregnant body is integrated into a positivist, high-tech vision of the body (Petchesky, 1...... half of the article ......rsity Press.Wickham, S. (2000). Health-informed midwife evidence 3: evaluation of obstetric evidence. Midwifery Today, 55, p45-46. Wickham, S. (2004) In Stewart, M. Pregnancy, birth and maternity care London: Books For Midwives, Bricker, L., Neilson, J ., & Dowswell, T. (2001). Ultrasound for fetal assessment in early pregnancy Cochrane Database of Systematic Reviews, Edition 4. Oxford doi: 10.1002/14651858.CD007058.pub2Van J. (2005). transparent body: a cultural analysis of medical imaging.Seattle: University of Washington Press.Verbeek, P. (2011).Chicago: University of ChicagoPressZechmeister, I. (2001). implications for women's reproductive freedom Health Care Analysis, 9, 387-400: 10.1023/A:1013837511115