Hi Rudy,
sorry for your loss, but don't worry about it. It was the first pregnancy and complications often occur. Second time around should be fine.
They have a typical pure henlei look, so don't worry about anything else being mixed in. They are very good looking though!
Henlei pregnancy can take very long, I have even had one that took 6 months! Sometimes it looks as if a henlei will have 5 pups but then there is only one that is nearly 8' (monsterpup).
Good luck on the next batch.
Greetings Mark