The first step in determining how your weight may affect your fertility is to calculate your body mass index (BMI), which also provides a solid starting point for determining how much weight you should acquire during pregnancy. If your BMI is under 18.5 or is more than 30, you run a higher chance of infertility. A healthy BMI range is 20 to 25. Even a small weight decrease can significantly increase fertility in people with a BMI of 30 or above.
