there is a way of working it out.
first take alook at the plating certificate riveted on her nearside.
second deduct the unladen weight
third calculate the extra fuel intake (eating for 2 
)
then if it’s a boy it will be 2/3’s of the figure left over if it’s a girl 1/2
so taking this equation I have come to find I still aint got a clue so my guess is
6lb 9oz
& seeing as some people are guessing in feet = ’ & inches I reckon
1’ 6"
hope it all goes well & rikki if she wants to hold your hand during the birth only let her hold 1 finger that way she cant break more than 1 
p.s dont forget to get your pod signed as I reckon you may be on for a demurrage claim