This study was planned as a pre-test post-test randomized controlled study in order to determine the effects of an online web-based deep relaxation exercise applied to pregnant women on maternal-fetal attachment and pregnancy perception. The study is planned to be conducted with pregnant women reached through social media (such as Facebook, Messenger, Instagram). The study is planned to be conducted between December 15, 2024 and June 15, 2025. The universe of the study will consist of pregnant women who volunteer to participate in online deep relaxation exercises and share their contact information. When the power analysis was performed, the sample size was calculated as a total of 80 pregnant women (40 experimental, 40 control), assuming that the web-based deep relaxation exercise applied would increase the mean maternal-fetal attachment score (72.25±7.16) (Güney and Uçar, 2019) by four and a half points at a 5% error level, a two-sided significance level, a 95% confidence interval, and an 80% ability to represent the universe (https://www.stat.ubc.ca/\~rollin/stats/ssize/n2.html). Pregnant women to be included in the groups will be selected from the relevant population using the improbable random sampling method.

Inclusion Criteria:

• Women with internet access,
• Women expecting a single baby,
• Women whose pregnancy is 12-24 weeks

Exclusion Criteria:

• Women with a history of physical and/or psychological illness and those taking any psychiatric medication
• Women who answered the survey questions incompletely.

IPD will not be shared, because before starting the research, pregnant women who will participate in the research, as they will be guaranteed that their personal information will be kept completely confidential and will only be used for this research purpose.