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  Pregnancy Calendar - First Four Weeks

You
Wierd as it seems, you're not actually pregnant in your first week of pregnancy! That's because midwives and doctors date pregnancy not from the day of conception, but from the first day of your last period. So, when your baby is conceived, you are already at least two weeks pregnant. You probably won't get a positive result from a pregnancy test until the fourth week, when your period would normally be due, although some tests may give you a result earlier.



Your Baby
Your baby isn't officially called a baby (or foetus) until about eight weeks after conception. For now, it's an embryo, starting as a single fertilised egg and then rapidly dividing into an ever-increasing cluster of cells as the journey continues along your Fallopian tube towards your womb (uterus). By the end of week four (about two weeks after conception), your baby's developing the layers that will become the different parts of their body.

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