http://www.womenshealthcaretopics.com/bloggingpregnancy/forum/ask-the-doc-for-answers/confused Simple:Press Forum Version 4.0.2 http://www.womenshealthcaretopics.com/bloggingpregnancy/forum/ask-the-doc-for-answers/confused/#p54 Ask the Doc for Answers http://www.womenshealthcaretopics.com/bloggingpregnancy/forum/ask-the-doc-for-answers/confused/#p54 Physicians calculate the pregnancy by weeks.  We start from the last menstrual peroid, not the day of conception.  So we start counting two weeks before you are actually pregnant.  That is on the day of conception she is considered two weeks pregnant. She is right, the dating of pregnancy is "weird".    Hope this helps.  

]]> Tue, 21 Apr 2009 21:58:16 -0400 http://www.womenshealthcaretopics.com/bloggingpregnancy/forum/ask-the-doc-for-answers/confused/#p53 Ask the Doc for Answers http://www.womenshealthcaretopics.com/bloggingpregnancy/forum/ask-the-doc-for-answers/confused/#p53 I'm having trouble understanding what my girlfriend is explaining to me. Today (3/21) she found out from her doctor that she is 9 weeks pregnant (which dates back to 2/17), but that the date of conception was 7 weeks ago (which dates 3/3). The reason I am asking for a clarification, is that I was away during the 2/17 time frame, but I was around during the 3/3 time frame. She tells me that the week number is done kind of weird. So what is the case?                                                                              Thanks, Angelo

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