Every woman knows when they are pregnant, she just didn't want anyone to know about it. After a few months your body does change and you will notice the difference. I had my menstrual for four months, lightly though and I didn't gain weight, but during the fifth month I felt movement inside and trust me, you do feel the baby moving especially when you are near your 6th or 7th month of pregnancy. The only way you don't feel the baby moving, means that the baby could be dead. So enough with all this nonsense of not knowing you were pregnant when you delivered during your 40th week of pregnancy.