Has anyone Conceived without having a menstal cycle??

Marcie • Married almost 10 years and together 17 we have a beautiful 5 year old daughter conceived in January but miscarried our son in April so we`re ttc just one last time before I turn 35
I conceived my daughter without having a menstral cycle then conceived in January but miscarried in April also without a menstral cycle, has anyone experienced this????