Rezeki, S. and Erin Padilla Siregar 2022. The Relationship between the Character of the Mother in Labor and the Retention of the Placenta at the Afisya Clinic, Hamlet III, Melur, Sambirejo East village, Percut Sei Tuan District Deli Serdang Regency 2017 - 2021. Science Midwifery. 10, 5 (Nov. 2022), 3811–3818. DOI:https://doi.org/10.35335/midwifery.v10i5.938.