In fact, underweight women may have difficulty getting pregnant. This is because it signals to the body that it is not a good time to reproduce. Furthermore, the system detects that the body is not strong enough to sustain another life. It may also send signals that you are experiencing a famine. Then the body will not produce enough estrogen. In fact, this is an important hormone for bone and sexual health in women. So being underweight can lead to irregular or absent periods. If you gain weight you may restore normal production of the hormone estrogen. Therefore, your periods will return to normal and increase your chances of getting pregnant. 3. How to gain weight safely It is important to gain weight the right way. Additionally, it is important to gain weight with a healthy diet. This is because some foods can help you gain weight and destroy your health at the same time. In fact, many people of normal weight suffer from chronic diseases. These include heart disease, type 2 diabetes and other health problems that affect obese people. Therefore, if you want to gain weight, it is essential to eat healthy foods. Also, you need to live a healthy lifestyle. There are several ways to gain weight healthily. Consume more calories than your body