Note: We have 15 other definitions for NV in our Acronym Attic. new search; suggest new definition; Search for NV in Online Dictionary Encyclopedia
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.
The weeks are grouped into three pregnancy trimesters. The first one of the trimesters of pregnancy is from week 1 to week 12, the second is from week 13 to week 27, while the third trimester of pregnancy lasts from week 28 to the birth.