Submitted on: 26 December 2017.
Revised on: 20 March 2018.
Accepted on: 07 April 2018.
___________________HUMAN REPRODUCTION UPDATE---OXFORD UNIV PRESS
Submitted on: 09 December 2011.
Revised on: 30 December 2011.
Accepted on: 13 January 2012.
___________________HUMAN REPRODUCTION UPDATE---OXFORD UNIV PRESS
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Submitted on: 10 December 1998.
Revised on: 04 February 1999.
Accepted on: 11 March 1999.
___________________HUMAN REPRODUCTION UPDATE---OXFORD UNIV PRESS