I. M. W. Supanji, A. A. R. Budayasa, P. A. N. K. Permatananda, Putu Nita Cahyawati, and Anak Agung Sri Agung Aryastut, “Relationship Between Maternal Age, Education, and Parity in The Incidence of Spontaneous Abortion in Bali”, midwifery, vol. 10, no. 4, pp. 3091–3095, Oct. 2022.