Fig. 2 (IMAGE) Osaka University Caption Experimental system of the oogenesis development by the microflora as an environmental factor. Ovaries are more prominent and mature eggs increase in a microbial environment. Credit 2023 Suyama et al., Microbes control Drosophila germline stem cell increase and egg maturation through hormonal pathways. Communications Biology Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.