Bodyweight (BMI) has a major impact on fertility – a BMI too high or too low can disrupt the hormones that control the monthly cycle in females and sperm production in men.
The optimum BMI for fertility is between 19 – 26; if it is below 19 it is advised that someone should gain some weight.
If IVF treatment is required, a BMI lower than 30 is necessary to be eligible for NHS funded treatment, and lower than 35 for self-funded treatment. However, to ensure the best chance of a successful pregnancy it is advised to have a healthy BMI.
In some cases, reaching an optimum BMI can help restore ovulation – the regular release of eggs – and therefore increase the chance of getting pregnant naturally.
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