[Association between hemoglobin levels before pregnancy and during pregnancy].
Jin
Lei
L
Institute of Reproductive and Child Health, Peking University Health Science Center, Beijing 100191, China.
Ye
Rong-wei
RW
Wang
Rong-qin
RQ
Wu
Zhu-zhong
ZZ
Chen
Hua
H
Ren
Ai-guo
AG
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
D006454:Hemoglobins