title: Reproductive histories in a Norwegian twin population: evaluation of the maternal effect in early spontaneous abortion.
mesh_terms: D000026:Abortion, Habitual / Q000209:etiology; D000022:Abortion, Spontaneous / Q000139:chemically induced / Q000235:genetics* / Q000503:physiopathology; D000328:Adult; D000367:Age Factors; D002869:Chromosome Aberrations / Q000235:genetics; D025063:Chromosome Disorders; D005260:Female; D006801:Humans; D008297:Male; D008393:Marriage; D008572:Menarche; D008593:Menopause; D008875:Middle Aged; D009664:Norway; D010375:Pedigree; D011247:Pregnancy; D011248:Pregnancy Complications / Q000209:etiology / Q000503:physiopathology; D014427:Twins; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic