How to Increase Your Success in IVF protocol. ∙ Maintain a healthy weight. It is difficult to overemphasize the impact of obesity on IVF success. Multiple studies show a low pregnancy rate in women with an increased body mass index. in addition, the percentage of miscarriage and complications during pregnancy and childbirth significantly increases. If one is overweight, our fertility specialists will take care to normalize thyroid hormones and check insulin resistance index. ∙ Optimize sperm health. Sperm quality is equally important as egg quality.