This does not add up. At all.

They add 2 weeks to the pregnancy. So if you ovulated 2 weeks after period that would be the 7th of dec you would have conceived. But by the 17 of jan you would be 6 weeks preg---or 8 weeks by the wheel the .Dr's use.

Now if you go by them saying you are 4 1/2 weeks pregnant--you conceived on the 16th of dec by ovulation -or the 30th by the dr's wheel.

Does not add up. Sorry I dont really know at all