Well I see your due April 18.
I reckon you'll have bubba on April 20.
That's my DD1's birthday, so I'll stick to it
LOL! That is my DS3's birthday too!

But I was going to say 40+3 - so 21st, which my DH wrote down Harrys birthday as for the first year of his life. He kept getting his and Sams mixed up, and wrote Sam as 30th and Harry as 21st. Men, huh.

So 21st, and I will give you a 12 hour labour. 8ish pre- 4 active.