C	Comparator
CI	Confidence interval
CKAP2L	Cytoskeleton-associated protein 2-like
COX-2	Cyclooxygenase 2
GWAS	Genome-wide association studies
I	Intervention
IL	Interleukin
JAK	Janus activated kinase
KEGG	Kyoto Encyclopedia of Genes and Genomes
MAPK	mitogen activated protein kinase
MMPs	Matrix metalloproteinases
NF-κB	Nuclear factor kappa B cell
NRS	Numerical rating scale
NSAIDs	Non-steroidal anti-inflammatory drugs
O	Outcome
OCPs	Oral contraceptive pills
P	Population
PCOS	Polycystic ovary syndrome
PGs	Prostaglandins
RCTs	Randomized clinical trials
ROB	Risk-of-bias
RoB 2	Cochrane risk of bias
SMD	Standardized mean difference
SRMA	Systemic review meta-analysis
STAT3	Signal transducer and activator of transcription 3
TNF-α	Tumor necrosis factor-alpha
V.C	Vasoconstriction
VAS	Visual analogue scale
VDR	Vitamin D receptor
VEGF	Vascular endothelial growth factor
Vit. D2	Ergocalciferol
Vit. D3	Cholecalciferol
Vit.D	Vitamin D