Department of Internal Medicine Beijing Obstetrics and Gynecology Hospital Capital Medical University Beijing 100026 China;
Department of Obstetrics Beijing Obstetrics and Gynecology Hospital Capital Medical University Beijing 100026 China;
Central Laboratory Beijing Obstetrics and Gynecology Hospital Capital Medical University Beijing 100026 China;
Department of Obstetrics Beijing Obstetrics and Gynecology Hospital Capital Medical University Beijing 100026 China;
Department of Internal Medicine Beijing Obstetrics and Gynecology Hospital Capital Medical University Beijing 100026 China;
Pregnancy; Breast cancer; Chemotherapy; Cryptorchidism; Case report;