Background: Adolescence is the most complex stage of reproductive health. The knowledge and awareness of adolescent-related reproductive issues are limited, particularly in lower-middle-income countries. Adolescent pregnancies are associated with major maternal and neonatal complications. Effective contraception use can prevent teenage pregnancy and subsequent complications.Methods: It was a cross-sectional study conducted in a tertiary care hospital and teaching institute over a period of one year. Through this study, we aimed to assess the prevalence of postpartum use of approved standard methods of contraception for birth spacing among teenage mothers and to assess the reasons for their non-acceptance. A total of 133 consecutive consenting postpartum teenage mothers were recruited in the study. Participants were asked about their age at the time of marriage and delivery, marital status, parity, education and economic status, the number of antenatal visits, mode of delivery, and antenatal complications. Compliance with postpartum contraception was noted, and reasons for its non-acceptance were asked in detail.Results: Among the 133 participants, contraceptive users were categorized into Group A and non-users into Group B. The mean age at the time of marriage was 17.6±0.4 and 17.5±0.6 years in Group A and Group B, respectively. Mothers in Group A were more educated than their counterparts in Group B (82.2% of mothers were educated up to 12th standard in Group A compared to 46.6% in Group B). Among the contraception users, 70% had four or more antenatal visits compared to 7.9% of the non-users. Reasons for non-acceptance of postpartum contraception were elicited in Group B: 42.0% had fear of becoming infertile, 38.6% feared that contraceptives interfere with breastfeeding and quality of breastmilk, 13.6% had opposition from family members, and 5.8% did not mention any reason.Conclusion: Teenage pregnancy is associated with increased feto-maternal complications. It also accounts for an increased incidence of unsafe abortions and maternal mortality. So it is crucial to make the adolescent group aware of effective methods of postpartum contraceptives to prevent adolescent pregnancies. Collaborative larger multicentric studies from different countries will help to reach a better, generalized conclusion regarding the same.