post-meiotic division [遗] 后减数分裂
oriented meiotic division [遗] 定向减数分裂
first meiotic division 第一次减数分裂 ; 第一减数
In June, the spermatocyte was in the first meiotic division. In July, the testis entered spermiogenesis.
在6月的精巢中，初级精母细胞开始进行成熟分裂，形成次级精母细胞。
参考来源 - 山溪鲵精巢的显微与超微结构研究The formation mechanism of aneuploid is an important focus in medical genetic research field. It is considered that aneuploid is often caused by chromosomal nondisjunction during cell division stage, chromatid predisjunction during meiotic division stage, and loss of chromosome.
染色体非整倍体的形成机制一直是医学遗传学研究领域的重要课题，目前认为多数是细胞分裂时期染色体不分离、减数分裂时期染色单体提早分离和染色体丢失引起。
参考来源 - 体外受精—胚胎移植周期中胚胎染色体非整倍体分析及移植价值探讨·2,447,543篇论文数据，部分数据来源于NoteExpress
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