| Literature DB >> 4440467 |
P Bergsjo, H Langengen, J Aas.
Abstract
Entities:
Keywords: Contraception; Contraceptive Agents; Contraceptive Agents, Female; Contraceptive Agents, Progestin; Contraceptive Methods; Diseases; Family Planning; Incidence; Measurement; Norethindrone; Oral Contraceptives; Pregnancy Complications; Pregnancy, Ectopic; Research Methodology
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Year: 1974 PMID: 4440467 DOI: 10.3109/00016347409157756
Source DB: PubMed Journal: Acta Obstet Gynecol Scand ISSN: 0001-6349 Impact factor: 3.636