from German Research Council

• “Male fertility and functional sperm structures“ 1992-1998

“Signaltransduction at capacitation and apoptosis in human spermatozoa” DFG: Gl 199/4-4: 2002-2010 

from University of Leipzig

• 1996-1997: Influence of progesterone on expression of sperm adhesion molecules.
• 1997-1998: Localisation of integrins ß1, ß3 and ß4 as well as of matrix proteins on the surface of male gametes by APAAP-technique 
• 1999-2000: Systematic investigations on expression of adhesion molecules and markers of apoptosis on human spermatozoa and in testicular tissue.
• 1999-2000: Influence of the expression of phosphodiesterase-subtypes on the fertility of human spermatozoa (molecularbiological investigations)

from industry — Clinical studies

• Bayer Co. (Bay 19-8004/10231) in the period 2000/2001
• European male reproductive health 2002 International study of the European Union with Centre in Copenhagen (Rigshospitalet Copenhagen, GR-5064, Blegdamsvej 9, DK-2100 Copenhagen)
• Long-term trial on transdermal testosterone substitution from gel preparations TGL-02/2001 (Fa. Wolff) 2002
• Long-term trial on testosterone substitution from gel preparations in various regimen (Fa. Wolff) 2002 - 2005