organism: Sus scrofa
description: Day 5-6 embryos were obtained from five healthy Landrace x Large White gilts at age four to six months. Details of the embryo collection are outlined by Degenstein and his co-workers (Theriogenology 70(7):1075-85, 2008). A total of two Pools of 20 expanded and 5 hatched blastocysts were identified and placed separately into two labelled vials designated with XB & HB respectively. All samples were stored at -80*C until RNA extraction.