title: [Association between hemoglobin levels before pregnancy and during pregnancy].
authors.affiliation: Institute of Reproductive and Child Health, Peking University Health Science Center, Beijing 100191, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Jin
authors.forename: Rong-wei
authors.initials: RW
authors.lastname: Ye
authors.forename: Rong-qin
authors.initials: RQ
authors.lastname: Wang
authors.forename: Zhu-zhong
authors.initials: ZZ
authors.lastname: Wu
authors.forename: Hua
authors.initials: H
authors.lastname: Chen
authors.forename: Ai-guo
authors.initials: AG
authors.lastname: Ren
mesh_terms: D000740:Anemia / Q000453:epidemiology*; D002681:China / Q000453:epidemiology; D005260:Female; D006454:Hemoglobins / Q000032:analysis*; D006801:Humans; D011247:Pregnancy; D011250:Pregnancy Complications, Hematologic / Q000453:epidemiology*; D011264:Pregnancy Trimesters
chemical_list: D006454:Hemoglobins