This page outlines the risks and possible complications linked to obesity and the benefits of losing weight. You may find this information useful as you have recently been given advice about how life style changes and weight loss will help to improve your fertility.

Problems and risks linked with obesity

  • Irregular periods
  • Increased risk of infertility
  • Increased risk during fertility surgery
  • Reduced success with fertility treatments

Pregnancy complications with obesity

  • High blood pressure during pregnancy
  • Diabetes in pregnancy
  • Birth defects
  • High birth weight baby
  • Caesarean section

Benefits of weight loss

  • Weight loss can improve ovulation and pregnancy rates.
  • It can improve your overall health.
  • It helps improve self-esteem and wellbeing.

Fertility centres strict policy for admitting women for treatment

  • If your BMI is more than 30 and less than 35, it is advised that you lose weight. You should aim to reach a BMI of 29.5 to be eligible for NHS fertility treatment.
  • If your BMI is more than 35, then treatment cannot be offered unless the above criteria is fulfilled.

Contact information

If you have any questions, please contact the fertility nurses through Mrs K Reddy’s secretary on the number below.

Cotswold Fertility Unit

Tel: 0300 422 3128

Monday to Friday, 8:00am to 4:00pm


Further information

For more information about fertility treatment please visit:

Human Fertilisation Embryology Authority


Printable version of this page

Body Mass Index (BMI) and fertility GHPI0773_12_23 Department: Gynaecology Review due: December 2026 PDF, 276.0 KB, 2 pages
Reference number GHPI0773_12_23
Department Gynaecology
Review due December 2026