The association of pregnancy complications with seasonal deviation is not a novel approach within certain borders of the scientific world but it is possibly a new discussion considering the changing seasonality of Bangladesh. This paper aims on correlating these two topics with the existing data available in a population-based survey of the Bangladesh Maternal Mortality (BMMS) report 2016. The BMMS report is developed using data from 175,000 interviewed households among which 168,000 were women and pregnancy complications for a sub-sample of 168,000 women whose pregnancy ended within the last three years were considered. The data accounts for major complications common within pregnant women like high blood pressure, edema, headache, obstructed labor, bleeding and convulsions. It includes pregnancy complications in relation to conception time, age at conception, schooling of the mothers, residence in urban or rural areas, which divisions they are from among the 8 of the country, sex of the child, parity and their wealth status. The paper intends to correlate how pregnancy complications differ taking into concern these factors. With the available data of childbirth and the complications the mothers faced during their pregnancy period the objective is to trace the seasonal exposure of the mothers. For example, a child born in the month of November, the mother will be exposed to the pre monsoon hot season in the first trimester. This mother will experience higher temperature and humidity all through her pregnancy period. This methodology demonstrated distinct fluctuation in edema within pregnant women where the odds ratio shows 30% lower complications of edema during the time frame of March-June than November- February. Whereas, the difference in occurrence of edema complications between July-October and November-February is only 4%. The paper discusses the social, biological and environmental determinants for this observation. The result looks forward to raising awareness about such pregnancy complications which demonstrate distinct variation considering different months of the year and to aid in improving the overall maternal health of Bangladeshi pregnant women.