Xavier, Maria RaúlResende, Cristina2013-07-022013-07-022011XAVIER, Maria Raúl; RESENDE Cristina - A qualitative study of fathers´ experiences of 3/4D ultrasound and paternal-fetal relationship: Differences between first and third trimester. In WAIMH 12th World Congress, Leipzig, Germany, June 29 – July 3, 2010.http://hdl.handle.net/10400.14/11763engA qualitative study of fathers' experiences of 3/4D ultrasound and paternal-fetal relationship: differences between first and third trimesterconference object