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American Focus > Blog > Tech and Science > Altered gut microbiome linked to fertility issues in people with PCOS
Tech and Science

Altered gut microbiome linked to fertility issues in people with PCOS

Last updated: June 29, 2025 5:55 pm
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Altered gut microbiome linked to fertility issues in people with PCOS
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Restoring Gut Microbes Could Improve Fertility in Women with PCOS

Restoring levels of specific gut microbes might help treat fertility issues in people with PCOS

Science Photo Library / Alamy Stock Photo

Polycystic ovary syndrome (PCOS) affects many women of reproductive age, leading to hormonal imbalances and fertility issues. Recent research suggests that restoring levels of a specific gut microbe could potentially improve fertility outcomes for women with PCOS.

A study conducted by Aixia Liu and her team at Zhejiang University in China focused on 220 women, half of whom had PCOS. The researchers discovered that women with PCOS were at a higher risk of pregnancy complications, such as miscarriage, preterm birth, and gestational diabetes, despite similar pregnancy rates. One key finding was that women with PCOS had significantly lower levels of a gut bacterium called Parabacteroides merdae compared to those without the condition.

Parabacteroides merdae plays a crucial role in converting nutrients like isoleucine into short-chain fatty acids, which are essential for reproductive health. The study revealed that women with PCOS had elevated levels of isoleucine and lower levels of short-chain fatty acids in their blood samples, along with higher isoleucine levels in their endometrial tissues.

Further experiments showed that exposure to isoleucine led to cellular senescence in endometrial cells, affecting their function during pregnancy preparation. These findings highlight the potential impact of gut microbiome changes on fertility issues in women with PCOS.

Andrea Dunaif from the Icahn School of Medicine at Mount Sinai in New York expressed some skepticism regarding the study’s implications on pregnancy outcomes in PCOS. However, she acknowledged the significance of targeting the microbiome for potential fertility treatments in PCOS patients.

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While more research is needed to fully understand the relationship between gut microbes and fertility in women with PCOS, this study paves the way for innovative approaches to improving reproductive health in this population.

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TAGGED:AlteredfertilitygutissuesLinkedmicrobiomePCOSpeople
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