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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.
Constipation is a common problem during pregnancy. As many as half of pregnant women get constipated at some point. Inside pregnancy: Weeks 28 to 37 A 3D animated look at a baby in the third trimester of pregnancy. Inside pregnancy: Weeks 28 to 37. A 3D animated look at a baby in the third trimester of pregnancy.