  Binary systems with neutron stars and double degenerate systems are crucial
objects to test current stellar evolution models and Einstein's general
relativity. In this study, we present angular momentum loss mechanism via
gravitational radiation and magnetized stellar winds for some selected systems
with a neutron star. We calculated and plotted their time scales for angular
momentum loss. Gravitational wave amplitudes of binary systems with a neutron
star components are also estimated and their detectability with a gravitational
wave detector (LISA) has been plotted.
