From yesterday my wife is feeling less movement of baby as she is 23 week 4 day pregnant. is it normal or need to worry about it?

Some concern: Fetal kick count is one way to assess fetal well being. Mom is asked to lie on her side at the same time every day and count fetal movements for 30 min.If they are decreased she should count for 30 more minutes.If they are still decreased she should call her doctor. This is usually done after 26 weeks. She should have something cold and sweet and if the kicks increase it is normal.Hope this helps