title: Comparison of the risk of ectopic pregnancy with the use of IUD or minipill.
authors.forename: M
authors.initials: M
authors.lastname: Ulstein
authors.forename: R
authors.initials: R
authors.lastname: Sandvei
mesh_terms: D003267:Contraception; D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D004194:Disease; D005193:Family Planning Services; D015994:Incidence; D007434:Intrauterine Devices; D011247:Pregnancy; D011248:Pregnancy Complications; D011271:Pregnancy, Ectopic; D045167:Progesterone Congeners; D012106:Research; D012107:Research Design
chemical_list: D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D045167:Progesterone Congeners
keywords: Contraception; Contraceptive Agents; Contraceptive Agents, Female; Contraceptive Agents, Progestin; Contraceptive Methods--complications; Diseases; Family Planning; Incidence; Iud--complications; Measurement; Pregnancy; Pregnancy Complications; Pregnancy, Ectopic--etiology; Progestins, Low-dose; Research Methodology