16 weeks and 5 days before April 4, 2013 was Saturday, December 8, 2012.
July
Could be a few days either direction.
May
32 days previously
Subtract fourteen weeks (7 days x 14) from the date of the ultrasound.
20th November 1995
31st March or thereabouts
just 11wks and 6 days before october18
April
Ten days after a period is the optimum time to conceive. So 2 weeks is about right. Congratulations.
16 weeks and 5 days ago!!!
Somewhere between 3rd and 9th December 2005.