On behalf of the local organizing committee, it is my great pleasure to invite you to the 4th World Congress of Reproductive Biology (WCRB 2017), held from 27th to 29th September 2017 in Okinawa, Japan. The Congress hosted by the Society for Reproduction and Development (SRD) aims to bring together leading academic scientists, researchers and research scholars to exchange and share their interests, experiences and research findings about all aspects of reproductive biology. The Congress will provide plenary lectures, interdisciplinary symposia and oral and poster sessions for all the participants to present and discuss the recent trends and concerns in the field of reproductive biology. We hope inherit the outstanding tradition of the WCRB and develop further values at the Congress.

The WCRB 2017 will be organized by 6 international societies in partnership; the Society for the Study of Reproduction (SSR, USA), Society for Reproductive Biology (SRB, Australia), Society for Reproduction and Fertility (SRF, UK), Chinese Society of Reproductive Biology (CSRB, China), Korean Society of Animal Reproduction (KSAR, Korea), and SRD (Japan).

The Okinawa main island is one of the most beautiful islands in the world, surrounded by the Pacific Ocean, with Nature, peaceful atmosphere, historical places and Ryukyuan cuisine. We look forward to showing you our hospitality at the Congress which will provide an ideal opportunity to relax and exchange ideas with colleagues from all over the world. The island has an international airport and also easy access from most of the international airports in Asia. We would also like to encourage you to share with us the atmosphere of this beautiful place.