No one would argue that men and women differ. The differences between the sexes are obvious and affect every aspect of life. The biological grounds for these differences are determined by the complementary yet distinct roles of the two sexes in the process of procreation. The success of human reproduction is related to the very efficient selection process for the proper genetic material that will, after 40 weeks of intense physical investment by the female, result in the birth of a healthy progenitor1. This ultimate goal of procreation determines the basic differences between male and female biology that presumably functions at the level of every cell.

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Financial support for the publication of this thesis was kindly provided by Abbott Immunology, Dr. Falk Pharma Benelux B.V., Ferring B.V. and Merck Sharp&Dohme Nederland B.V.
M.P. Peppelenbosch (Maikel) , E.J. Kuipers (Ernst)
Erasmus University Rotterdam
Erasmus MC: University Medical Center Rotterdam