It is probably caused by abnormality of hormone control of ovarian cycle and various factors in ovary.

其发生可能与卵巢周期各种激素水平调控和卵巢内各种因子调控异常有关。

youdao

Objective to investigate the expression of nuclear receptor subfamily 4, group a, member 1 (NR4A1) in human follicular cells during the ovarian cycle.

目的探讨核受体激素nr4a1在人卵巢周期中的表达和定位及其在卵泡发育中的调控机理。

youdao

It is also unique in that it placed an emphasis on the impact of a patient's age, her ovarian response, the characteristics of her cycle, and the final outcome - a birth.

此研究的独特处也在于它强调了病人年龄、卵巢反应、周期特点、以及最终结局—胎儿出生的影响。

youdao

Researchers will study whether inserting the Pap brush deeper, testing during different times of the menstrual cycle, or other factors might improve detection of ovarian cancer.

NPR: Retooling Pap Test To Spot More Kinds Of Cancer