Zzaqia, Hanifatu, et al. “The Effect of 3 Months Kb Injection With Changes in Menstrual Cycle at Pmb Hanifatuz Zakiyah Kandang Tepus Senduro Lumajang Undergraduate Midwifery Study Program Stikes Hafshawaty Zainul Hasan Genggong Probolinggo”. JURNAL ILMIAH OBSGIN : Jurnal Ilmiah Ilmu Kebidanan & Kandungan P-ISSN : 1979-3340 E-ISSN : 2685-7987, vol. 15, no. 2, May 2023, pp. 84-93, doi:10.36089/job.v15i2.1139.