5-HT	Serotonin
5-HTP	5-hydroxytryptophan
5-HTT	Serotonin transporter
5-HTTLPR	Serotonin transporter-linked polymorphic region
ADHD	Attention deficit hyperactivity disorder
ASD	Autism spectrum disorders
BDNF	Brain derived neurotrofic factor
E	Embryonic day
HPA	hypothalamo-pituitary-adrenocortical
IDO	Indoleamine 2,3-dioxygenase
IL	Interleukins
L-allelic	Long-allelic
MAOA	Monoamine oxidase A
(m)PFC	(Medial) Prefrontal cortex
OCT3	Organic cation transporter 3
Poly(I:C)	Polyriboinosinic–polyribocytidylic acid
S-allelic	Short-allelic
SSRIs	Selective serotonin reuptake inhibitor
TDO	Tryptophan 2,3-dioxygenase
TPH	Tryptophan hydroxylase