Well too much vomiting can be. But "morning sickness" is a common symptom for pregnant women. If you're puking too much I would tell your doctor, he/she may be able to perscribe you something to help.
oo kk its not harmful for the baby?
Yes! Some ladies puke thorought their whole pregnancy. I'm 17 weeks and I wouldn't say I've really gotten morning sickness. I know what triggers me to puke(If I don't eat in the morning, and then I try to eat a lot at once cuz I'm so hungry). But some ladies get sick just some of their trimesters, and some ladies don't get sick at all. Each and every pregnancy is different and will contain different symptoms. And some ladies don't get any symptoms.