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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.
Like onlymyhealth on Facebook! Pregnancy is divided into 3 stages, which are commonly referred to as âtrimesters of pregnancyâ. Each stage of pregnancy brings new changes in a woman and the growing baby. First Trimester of Pregnancy First stage or trimester of pregnancy starts from 1st until 14th week.