Sean P. Flaherty
The Modern Laboratory · People
The Modern Laboratory
Sean P. Flaherty
A sperm biologist who helped film fertilisation in Adelaide, then carried that work to a clinic in Japan.
Beginning with sperm. Sean P. Flaherty trained at the University of Adelaide, where his PhD, awarded in 1986 by the Department of Anatomy and Histology, examined the hooked sperm head of the plains mouse, a native Australian rodent. He then worked in the Department of Cell Biology at Vanderbilt University in Nashville, studying how guinea pig sperm change as they prepare to meet the egg.
Back in Adelaide. By 1993 he had joined the Department of Obstetrics and Gynaecology of the University of Adelaide at The Queen Elizabeth Hospital. Much of his work there used fluorescent DNA probes to count chromosomes in single sperm and eggs. He tested methods said to separate X-bearing from Y-bearing sperm, and he studied why some eggs failed to fertilise, or fertilised abnormally, after intracytoplasmic sperm injection (ICSI).
The 1997 films. Flaherty was second author, with Dianna Payne, Michael Barry and Colin Matthews, of the 1997 Human Reproduction study that filmed 50 eggs after ICSI. It showed waves passing through the egg's cytoplasm, the second polar body appearing, and the two pronuclei drawing together. Video from this work is held in the Virtual Human Embryo collection at Louisiana State University Health Sciences Center.
A friendship with Yonago. The Mio Fertility Clinic in Japan records that Payne and Flaherty visited in April 2005 for a joint research meeting on filming embryos. Yasuyuki Mio's team later thanked them both for helping to develop its high-resolution time-lapse culture system. By 2019 Flaherty was himself listed at the clinic, as a co-author of a study on how the salt concentration of tiny culture drops drifts in incubators without added humidity.
Also see: Dianna Payne, Michael F. Barry, Colin Matthews, Yasuyuki Mio
About the sources
- Yumoto K, Iwata K, Sugishima M, et al., Flaherty S, Mio Y. Unstable osmolality of microdrops cultured in non-humidified incubators. Journal of Assisted Reproduction and Genetics 2019;36:1571–1577. PubMed 31267335 (author given as Sean Flaherty, Mio Fertility Clinic).
- Mio Y, Yumoto K, Sugishima M, Nakaoka M, Shimura T, Tsounapi P. Morphokinetic features in human embryos: analysis by our original high-resolution time-lapse cinematography. Summary of the past two decades. Reproductive Medicine and Biology 2024;23:e12578. PMC11077290 (abstract, introduction and acknowledgements).
- Mio Fertility Clinic, Yonago: "About MFC" page, director profile and clinic history (mfc.or.jp/about_mfc), opened 7 October 2026.
- Virtual Human Embryo, Louisiana State University Health Sciences Center: Carnegie Stage 1 video page "Stage1_VideoPayne1".
- University of Adelaide Digital Library, record 2440/8231 (the 1997 paper, with authors given in full as Dianna Payne, Sean P. Flaherty, Michael F. Barry, Colin D. Matthews).
- Payne D, Flaherty SP, Barry MF, Matthews CD. Preliminary observations on polar body extrusion and pronuclear formation in human oocytes using time-lapse video cinematography. Human Reproduction 1997;12(3):532–541. PubMed 9130755.
- Flaherty SP, Payne D, Swann NJ, Matthews CD. Aetiology of failed and abnormal fertilization after intracytoplasmic sperm injection. Human Reproduction 1995;10(10):2623–2629. PubMed 8567782.
- Flaherty SP, Matthews CD. Application of modern molecular techniques to evaluate sperm sex selection methods. Molecular Human Reproduction 1996;2(12):937–942 (University of Adelaide record 2440/8398, author given as Sean P. Flaherty).
- Flaherty SP, Olson GE. Membrane domains in guinea pig sperm and their role in the membrane fusion events of the acrosome reaction. Anatomical Record 1988;220:267–280. PubMed 3364752 (Vanderbilt affiliation).
- Flaherty, Sean P. Structural and functional aspects of sperm head morphology in the plains mouse, Pseudomys australis. PhD thesis, Department of Anatomy and Histology, University of Adelaide, 1986. University of Adelaide Digital Library.
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Compiled with AI-assisted research and checked against the original sources. Not yet peer-reviewed. Corrections are warmly welcomed.
