Obesity is cause of most of health problems and in females abnormal weight can cause infertility. Research survey shows that 12 % infertility are caused by higher or lower fat in woman.
Estrogen hormone is responsible for the body weight and fertility. Estrogen is a sex hormone produced in fat cells. If a female body has too much fat then it will produce more estrogen hormone and it reacts as birth control and chances are very narrow to get pregnant. If a female body have very less fat then body will produce very less estrogen and her reproductive cycle begins to shutting down and it will cause problems in getting pregnant.
Abnormal weight both higher and lower can cause many sexual problems like irregular periods very heavy or less bleeding and may more.
So maintain a good body fat for healthier fertility.