1 Department of Sociology, Centre for Population, Family and Health, University of Antwerp, Sint-Jacobstraat 2-4, 2000, Antwerp, Belgium. sarah.vandevelde@uantwerpen.be.
2 Department of Sociology, Centre for Population, Family and Health, University of Antwerp, Sint-Jacobstraat 2-4, 2000, Antwerp, Belgium.
3 International Centre for Reproductive Health, Ghent University, Ghent, Belgium.