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The lead author of a new , Flinders University鈥檚 , is calling for an end to 鈥榰njust鈥� guidelines restricting obese Australian women鈥檚 access to assisted fertility treatment such as IVF. According to the paper, the guidelines suggest that a body mass index exceeding 35 kg/m² should be an absolute contraindication to assisted fertility treatment such as in vitro fertilisation IVF.

Published in the , Professor Tremellen points out that the guidelines, set by the (RANZCOG), are overly restrictive given that IVF success rates in obese women were only marginally reduced compared to their lean counterparts, and far superior than success rates in women older than 40 years of age, who do have access to IVF. In fact, a quarter of all Australian IVF treatment is to assist women who .

Professor Tremellen said the guidelines unfairly penalise obese women鈥檚 male partners from becoming parents and made little biological sense when IVF is the only treatment likely to produce pregnancy, as is the case with blocked fallopian tubes or poor sperm quality.

鈥淭hese prohibitions by the Royal Australian and New Zealand College of Gynaecology fly in the face of statistics showing that success rates for obese women are much higher than those observed for many older women who are allowed access to IVF,鈥� he said.

鈥淔urthermore, as obesity is significantly more common in women of low socioeconomic status, a group that struggles to get access to high-quality food and supervised exercise programs, this policy could even be considered as discriminatory.鈥�

Professor Tremellen said pregnancy for obese women does pose increased risk but that the absolute magnitude of risks to mother or child is relatively small.

鈥淭he role of the doctor should be to educate women about these risks and how they can be reduced by weight loss, but allow women to make the final decision regarding whether they access IVF,鈥� he said.

鈥淎s such, we believe the RANZCOG ban on severely obese women鈥檚 access to assisted reproductive treatment is unwarranted and should be revised.

鈥淲e would suggest that the RANZCOG statement makes reference to the overall health of obese women, not merely their BMI, when deciding on delaying access to ART (assisted reproductive technology).鈥�

Up to a third of women with a BMI exceeding 35 are 鈥渕etabolically healthy鈥� and for this group there is minimal evidence that pregnancy poses significant risks to either themselves or their child.

The new paper also argued that prohibiting access to fertility treatment on the basis of obesity made no more sense than prohibiting adults from engaging in dangerous sports.

Image credit: 漏stock.adobe.com/au/ Dmytro Sukharevskyi