Health experiences of female migrant workers engaged in the urban informal economy in developing economies remain grossly under-documented. This study focused on the maternal health experiences of female workers at construction sites in Ahmedabad, India. It specifically looked at the duration of pregnancy, childbirth, and the postpartum period. Anthropometric measurements were recorded and in-depth interviews were conducted with a primary sample of female migrant workers (n = 55), which comprised of pregnant women, lactating mothers, and those with children under the age of five. Two focus group discussions (FGDs) with male workers were undertaken and interviews were held with other stakeholders (n = 13). A majority of female participants in the study belonged to historically marginalized Scheduled Tribe groups (76%). Anthropometric measurements of our study participants suggested that a significant proportion of women (47%) were underweight or suffered from low BMI (M = 18.36, SD = 1.7). The majority of women in our sample worked late into their pregnancies and returned to work within a few weeks of childbirth, to avoid further wage loss. Access to antenatal care and postpartum care was limited by time constraints, inability to take breaks from work, and irregular wage patterns. Furthermore, women perceived urban healthcare systems as unfamiliar, unaffordable, and challenging to reach or navigate. Pregnant women preferred to go back to their villages for childbirth and postpartum care as there was likely to be greater familial support, which was absent in the city. Our study finds that migration and informal work conditions at construction sites have diverse and complex implications for women in need of maternal healthcare.