Table 3.

Serum 25(OH)D levels in each group.

Grouping	Early pregnancy serum 25(OH)D value (ng/ml)	Serum 25(OH)D value in the third trimester of pregnancy (ng/ml)	△25(OH)D value (ng/ml)
Normal pregnancy group (D group)	18.21 ± 6.73	21.04 ± 7.63	2.83 ± 4.23
Hypertension during pregnancy (A group)	17.47 ± 6.41	20.66 ± 7.06	3.20 ± 4.65
Preeclampsia group (B group)	14.33 ± 5.60	16.54 ± 6.51	2.20 ± 5.02
Severe pre-eclampsia group (C group)	11.26 ± 4.54	13.03 ± 5.79	1.77 ± 5.07
F	15.34	16.26
P	<0.05	<0.05	P'<0.05