title: [Yoon's ring in the immediate postpartum. Preliminary report].
mesh_terms: D000328:Adult; D005069:Evaluation Studies as Topic; D005193:Family Planning Services; D005260:Female; D006801:Humans; D049590:Postpartum Period; D011247:Pregnancy; D013246:Sterilization, Tubal / Q000379:methods*; D013997:Time Factors
vernacular_title: El anillo de Yoon en el postparto inmediato. Reporte preliminar.