实验中遇到的怪事，请教一下大家

iseeyou1210

we have this problem recently. We can see the red uterus on E3.5. however, when we flush the uterus and found no blastocyst.$ A" m9 N/ A7 g) ~  x4 a$ M
Most likely we miss the normal cycle of female.# j+ L5 J# @; y* f7 Q
As some animal caretakers said, sometimes, the males just pump some air inside.
( W" U7 x0 W6 \2 F3 N. `They play for fun!