title: Correlation of pregnancy with the timing of introduction of loop according to different phases of menstrual cycle.
mesh_terms: D005260:Female; D005306:Fertilization; D006801:Humans; D007194:India; D007434:Intrauterine Devices; D008598:Menstruation; D010060:Ovulation; D011247:Pregnancy; D012189:Retrospective Studies