30 weeks
A little over 21 weeks from 1st December 2010 to 1st May 2011.
34 weeks and 6 days.
19 weeks.
A little over 9 weeks until 28 May 2010.
Between January 1st 2010 and May 1st 2010 there are 121 days. There are 12.7 weeks between January and May of 2010.
From 19 May to 7 November, 2010 there are 24 weeks and 4 days.
21 weeks before May 11, 2011 was December 15, 2010.
18 weeks (rounded down) from 23rd May 2010 until 1st October 2010.
There are 50 weeks and one day.
78 weeks (rounded down).
If your due date is May 14, 2010 you are 9 weeks pregnant