If you have had a baby and are trying to conceive again, you might well be curious whether morning sickness is the same for subsequent pregnancies. If your first pregnancy forced you to spend much of the time in the rest room, will that set the trend for any future pregnancies, too? Or if you never had any nausea at all, does that mean you are in the clear for all eternity? It's quite logical to wonder about something like this, I think. Unfortunately, or fortunately as the case may be, no two pregnancies are the same. Just because you did not have any nausea during one pregnancy does not mean that you will not be throwing up multiple times a day with the next.
On a more sunny note, women who experienced extreme morning sickness before might just feel a lot better if they get pregnant again. I have been pregnant a few times I have had healthy pregnancies as well as pregnancies that ultimately resulted in miscarriage. As far as morning sickness is concerned I can say that there are no hard and fast rules at all. The pregnancy during which I experienced most nausea (I had days when I vomited around 15 times a day) ended in a miscarriage, but my other pregnancy that ended in a miscarriage was nausea-free. I thew up when I was expecting my daughter, but with my son I had no morning sickness (or any other pregnancy symptom) at all. The conclusion? It's all normal, and you can never tell what amount of morning sickness you will have during subsequent pregnancies.