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Dr Felix Day

Postdoctoral Associate
Career Development Fellow, MRC Epidemiology Unit
Genetic Epidemiology

Felix Day is a Career Development Fellow at the University of Cambridge MRC Epidemiology Unit and a Postdoctoral Associate at Jesus College.

Academic interests

I am a career development fellow in the Growth and Development programme at the Medical Research Council Epidemiology Unit, where I also did my PhD.


Before moving to Cambridge, I studied at the University of Oxford and the London School of Hygiene and Tropical Medicine. My research interests include the links between reproductive phenotypes and disease, particularly metabolic disorders. This research includes using methods in both genetics and epidemiology to understand causality in these conditions. In particular I have worked on projects that have linked double-stranded DNA repair to timing of menopause, and timing of puberty to a range of cancers in later life.

Publications, links and resources

  • JRB Perry, FR Day, CE Elks, et. al. “Parent-of-origin-specific allelic associations among 106 genomic loci for age at menarche” Nature 2014
  • FR Day, KS Ruth, DJ Thompson, et. al. “Large-scale genomic analyses link reproductive ageing to childhood growth, breast cancer susceptibility and BRCA1-mediated DNA double strand break repair”. Nature Genetics 2015
  • FR Day, DA Hinds, JY Tung, et. al. “Causal mechanisms and balancing selection inferred from genetic associations with the Polycystic Ovary Syndrome”                                                                         Nature Communications. 2015
  • FR Day, H Helgason, DI Chasman, et. al. “Physical and neuro-behavioural determinants of reproductive onset and success” Nature Genetics 2016
  • FR Day, DJ Thompson, H Helgason et. al. “Genomic analyses for age at menarche identify 389 independent signals and indicate BMI-independent effects of puberty timing on cancer susceptibility” Nature Genetics 2017

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