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Pregnancy Week by Week: One Week Pregnant. During the first week of your pregnancy, you are not actually pregnant. Conception usually occurs about two weeks after your period begins, which means that your period is counted as the first part of your pregnancy, even though you were not pregnant at the time.
One of the most frightening things is to experience bleeding in the first part of the pregnancy. First trimester bleeding is any bleeding noted during the first 12 weeks of pregnancy, and it is one of the most common symptoms to send a woman to her obstetrician. And rightly so, because until a non-threatening cause is identified, all first trimester bleeding is labeled âthreatened miscarriage,â or âthreatened AB.â.