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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.
Reviewed by. Dr. Daniel Lee. The first two weeks of pregnancy can be very exciting for a woman â¦ and yet not so exciting. The not-so-exciting part of this second week is that the ever-so-popular pregnancy symptoms begin to kick in.