A failure of implantation in <i>Arid1a</i>^<i>d/d</i> mice.

<p>(A) Implantation sites were not detected in the uteri of <i>Arid1a</i>^<i>d/d</i> mice (n = 5), compared with <i>Arid1a</i>^<i>f/f</i> mice at 5.5 dpc (n = 5). Arrow heads indicate implantation sites. (B) Histology of implantation site in <i>Arid1a</i>^<i>f/f</i> (a and c) and <i>Arid1a</i>^<i>d/d</i> mice (b and d) at 5.5 dpc. (C) While well-attached embryos were found in <i>Arid1a</i>^<i>f/f</i> (a and c), free-floating embryos were found in the uterine cavity of <i>Arid1a</i>^<i>d/d</i> mice at 4.5 dpc (b and d).