1. Department of Gynecology, Shaoxing Women and Children's Hospital, Shaoxing, Zhejiang 312000, P.R. China
2. Genetic Laboratory, Shaoxing Women and Children's Hospital, Shaoxing, Zhejiang 312000, P.R. China
3. Reproductive Center, Shaoxing Women and Children's Hospital, Shaoxing, Zhejiang 312000, P.R. China