Columbia subject headings:
Central nervous system.
Neuroendocrinology.
Pain--Physiological aspects.
Sex (Biology)
Harvard subject headings:
Central nervous system.
Estrogen.
Neuroendocrinology.
Opioid peptides.
Pain--Physiological aspects
Pain.
Sex (Biology)
Princeton subject headings:
Estrogen.
Neuroendocrinology.
Opioid peptides.
Pain.
Sex (Biology)