Scanty of data are available on nutrition and immediate symptoms of postpartum mothers and their access to health and nutrition services in pregnancy period in India and North-East India. This is a comprehensive approach of studying how early childbearing is associated with maternal health risks and nutritional status, maternal access to health and nutrition services and their knowledge of WHO recommendations on nutrient supplements comparing the differences between adolescent and adult mothers belonging to Adi-Minyong community of Arunachal Pradesh in North-East India. A total of 175 eligible mothers were selected and divided into two age categories: Adolescent mothers (15–19 years) and adult mothers (20-40 years) each with an infant from Siang and West-Siang districts. Differences in service use and postpartum health outcomes between adolescent and adult mothers were evaluated using multivariate regression models. Higher number of adolescent mothers were school dropouts and belonged to low-income-group maternal households. The awareness of antenatal care and nutrition services was similar for adolescent and adult mothers but significantly higher number of adult mothers received four times of ANC services and practised nutrient supplementation for longer duration in pregnancy. Adolescent mothers weighed significantly less than adult women (51.78±5.62 vs. 55.42±6.22 kg, p<0.001) and their body mass index was significantly lower (21.97 vs. 23.19, p<0.001). Adolescent mothers recovered later with more difficulty after childbirth had significantly with lower scores for “postpartum functional abilities” (Adolescent=46.63±17.51 vs Adult=57.13±18.37; p<0.0001). This study confirmed that adolescent childbearing exposes substantial risks to mothers after childbirth, and they lagged behind in attaining knowledge on benefits of ANC and nutrition services.