This is a study of 10,000 men, their (pregnant) partners and their new-born children. Information will be collected on the incidence of urogenital disorders such as Cryptorchidism, Hypospadia, lifestyle, working conditions of the male partner and time to pregnancy. The quality of paternal semen will also be assessed.
FH Pierik, A Burdorf, JA Deddens, RE Juttmann, RFA Weber, Maternal and Paternal Risk Factors for Cryptorchidism and Hypospadias: A Case-Control Study in Newborn Boys, Environmental Health Perspectives 2004, 112, 1570-1576.
FH Pierik, A Burdof, JMR Nijman, SMPF de Muinek Keizer-Schrama, RE Juttman, RFA Weber, A high hypospadias rate in The Netherlands, Human Reproduction 2002, 17, 1112-1115.
RFA Weber, FH Pierik, GR Dohle, A Burdorf, Environmental influences on male reproduction, BJU International 2002, 89, 143-148.
Pierik FH, Burdorf A, de Muinck Keizer-Schrama SMPF, Wolffenbuttel KP, Nijman JMR, Juttmann RE, Weber RFA. The cryptorchidism rate in the general population in the Netherlands. Int J Androl 2005 (in press)
Frank H. Pierik FH, James A. Deddens JA, Burdorf A, de Muinck Keizer-Schrama SM, de Jong FH, Weber RFA. The hypothalamus-pituitary-testis axis in boys younger than 6 months: a comparison of cases with cryptorchidism or hypospadias versus controls. Submitted