Table 2: Rett Syndrome being an X-linked disorder manifested in females, we segregated the male and female subjects of the typical ASD group for comparing with controls.

Subjects	Number of subjects (N)	Serum BDNF concentration (ng/mL)
		Mean	SD (Range)	p value as compared to Controls
The significance is set at p<0.05.
Controls	25	225.16	±79.54 (145.63–304.70)	–
Typical ASD Males	14	231.02	±62.53 (168.49–293.56)	0.82
Typical ASD Females	11	164.16	±47.82 (116.34–211.99)	0.018*