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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.
during the first trimester of pregnancy women find out they are pregnant attend the first prenatal appointment and notice a long list of changes in their body understanding what happens in the body during the first trimester of pregnancy is important as some changes may not feel the way a pregnant woman expected