
Welcome
Our lab studies the neuroendocrine control of reproduction. We’re particularly interested in how circadian rhythms affect fertility.
Our Research
Neuroendocrine circuitry
We study the development and maintenance of the hypothalamic circuits that regulate reproduction, particularly GnRH and Kisspeptin neurons.
Circadian control of reproduction
We study the contribution of the circadian rhythms to ovulation and the maintenance of fertility.
Suprachiasmatic nucleus heterogeneity
We study determinants of functional diversity among neurons in the master circadian pacemaker
Right: Gonadotropin-releasing hormone (GnRH) neurons in the preoptic area.

Links
3D-printed feeders and more at our Github
Educational circadian biology resources at The BioClock Studio
Recent Publications
Haploinsufficiency of Sox2 causes fewer GnRH neurons and delayed puberty in mice
An electroencephalogram microdisplay to visualize neuronal activity on the brain surface
Contact
Oregon Health & Science University
Department of Obstetrics & Gynecology
tonsfelk at ohsu.edu