The study focused on the use of Fasteners and Disposal of Fullness in the Development of Functional Maternity Apparels from Commercial Block Patterns, in Federal Capital Territory Abuja, Nigeria. The major objective was to develop maternity apparels from commercial block patterns, fasteners and disposal of fullness in FCT Abuja. Eight objectives, eight research questions and four research hypotheses were formulated to guide the study. The research design used for the study was Research and development (R&D) design. The population of the study was one hundred and twelve thousand; four hundred and thirty(112,430) pregnant women. The sample size was 399 calculated with Taro Yamane sampling method: n= N/ (1+N (e) ^2). Instrument used for the collection of primary data for this study, was questionnaires. The research questions were analyzed with descriptive statistics using mean and cumulative mean, the decision rule was put at 3.00. The research null hypothesis one was tested with the independent test statistic while Analysis of Variance (ANOVA) was used to test the null hypotheses two, three and four at 0.05 level of significance to determine, if significance differences exist. The findings revealed that there is no significant difference in the mean ratings of users and judges on the requirements (needs) of pregnant women in F.C.T. Abuja with calculated p-value of 0.461that was higher than the 0.05 alpha level of significance. The findings revealed that significant difference exist among the mean rating of users on fit of functional apparels for first, second and third trimesters calculated p-value of 0.004that was lower than the 0.05 alpha value or table value. The findings revealed that there is no significant difference among the mean rating of users (first, second and third trimesters) on the aesthetic attributes of the garments calculated p-value of 0.560that was higher than the 0.05 alpha value. The findings revealed that there is no significant difference among the mean responses of judges on the aesthetic attributes of the functional apparels by pregnant women calculated p-value of 0.090 that was higher than the 0.05 alpha value. It was recommended that the pregnant women should use the functional maternity apparels designed from commercial block patterns with fasteners and disposal of fullness techniques for adjustment to first, second and third trimester stages during pregnancy.