Table 1. Clinical manifestations of normal fetus and NTD fetus.

Sample ID	Sample type	tissue	Folate of tissue (ng/mg)	Gender	Gestational weeks
1-1	Normal	Brain	0.050	Female	39
2-1	Normal	Brain	0.090	Female	36
3-1	Normal	Brain	0.199	Male	30
4-1	Normal	Brain	0.110	Female	25
5-1	Normal	Brain	0.050	Female	39
6-1	Normal	Brain	0.120	Male	38
7-1	Normal	Brain	0.200	Female	30
1-2	Spina bifida	Brain	0.014	Female	40
2-2	Spina bifida	Brain	0.036	Female	33
3-2	Spina bifida	Brain	0.040	Female	32
4-2	Spina bifida	Brain	0.042	Female	27
5-2	Spina bifida	Brain	0.029	Female	38
6-2	Spina bifida	Brain	0.053	Male	38
7-2	Spina bifida	Brain	0.051	Female	32