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It depends on how you're counting. Doctors determine how far along you are by the beginning date of your last menstrual period (LMP). They then usually follow up this estimation by a dating ultrasound, which gives a more accurate reading of how far along you are.

For example, when I got pregnant, I estimated my LMP at February 15th. In mid-April, I discovered I was pregnant, and a few weeks after my first obstetrician's appointment I had an ultrasound, which said that I was 12 weeks along. I then simply counted back 12 weeks from that point and estimated that I got pregnant sometime around March 10th.

So if you're 25 weeks pregnant, count back 25 weeks.

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14y ago

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