From: Prevalence, risk factors and associated adverse pregnancy outcomes of anaemia in Chinese pregnant women: a multicentre retrospective study
Total
Anaemia
Severity of anaemia
Mild
Moderate
Severe
N
%
1st trimester
26,924
732
2.7
567
77.5
165
22.5
0
–
2nd trimester
33,879
4996
14.7
4144
82.9
848
17.0
4
0.1
3rd trimester
41,569
6888
16.6
5073
73.6
1800
26.1
15
0.2