Methods 82 pairs of female -female twins between 6-12 years old were collected.Twin zygosity diagnosis were made by DNA-fingerprinting. 方法收集6-12岁女性双生子82对，通过DNA指纹图进行卵型诊断。
Short tandem repeat polymerase chain reaction used in prenatal diagnoses of the zygosity and common chromosomal trisomies in multiple pregnancies 短串联重复序列聚合酶链反应产前诊断多胎妊娠合子性质及常见染色体三体
