My current research interests include determination of PLC zeta (PLCζ) concentration in sperm of dogs and equine and how it relates to fertility. Some cases of male infertility, especially those associated with normal sperm numbers and motility may be caused by decreased amounts of a factor(s) in the sperm responsible for inducing egg activation and initiation of embryo development. Less than optimal fertility may be also explained by decreased amounts of this protein in sperm. This putative factor is likely to be the recently identified PLCζ. We are securing specimens of infertile dogs and stallions that visit our services as has been recently published in: C. Gradil, S-Y. Yoon, J. Brown, C. He, P. Visconti, R. Fissore. 2006. PLCζ: a marker of fertility for stallions? Animal Reproduction Science 94:23-25.