The first baby movement during pregnancy week by week! As written before, there is a wide range of time for when the flutters can be noticed by pregnant women for the first time. Generally, many pregnant women begin to feel them about 16 to 25 weeks after their conception. Veteran moms usually can feel the flutters earlier (after about 13-16 weeks). In other words, you may notice them earlier if this is not your first pregnancy. But you may feel them later (probably more than 25 weeks after you conceive) if you have the pregnancy for the first time.