Depends on the quantities of explosives required and what kind of containers they are packed in.
For example, whatever was stuffed inside the radio on Flight 103 couldn't have been that large. Also, the birth canal expands to permit a babies' head.
But then, the position for birthing is intentionally more comfortable than that of an airline passenger seat.
All in all, I think this is a deadly development, and that the world-wide Islamic terrorists sought out the sofest target, a Russian airline, to pull this off.
As they've done today, with the hostage holding of school children by Chechen terrorists, the soft belly right now is Russia. You remember earlier when videos were discovered in Afghanistan of practrice training for what appeared to be a school take-over; whatever thay say they are aiming to do, they do.
Their current, stated goal, is the death of 4 million Americans.
I am taking them at their word.