title: Physical activity before you know you are pregnant.
authors.forename: M
authors.initials: M
authors.lastname: Hatch
mesh_terms: D000022:Abortion, Spontaneous / Q000453:epidemiology / Q000209:etiology*; D010064:Embryo Implantation; D015444:Exercise; D005260:Female; D006801:Humans; D011247:Pregnancy