From: Prevalence, risk factors and associated adverse pregnancy outcomes of anaemia in Chinese pregnant women: a multicentre retrospective study
Number
Percent
Hb (g/L)
Testing time (week)
1st trimester
26,924
61.2
129.89 ± 9.90
10.65 ± 2.72
2nd trimester
33,879
77.0
118.99 ± 9.78
23.17 ± 3.39
3rd trimester
41,569
94.5
121.21 ± 12.62
37.24 ± 2.71