The average length of a woman's menstrual cycle is 28 days.

妇女的平均月经周期是28天。

Ovulation usually takes place 14 days after the beginning of your menstrual cycle.

排卵通常发生在经期开始后的第14天。

During pregnancy and the menstrual cycle, hormones encourage water retention in the fat cells.

在女性的孕期和生理周期身体产生的激素使脂肪细胞保持水分的能力增强。

More than half the sportswomen I surveyed said they felt their menstrual cycle affected their performance.

调查中，超过一半的女运动员认为生理期影响了她们的表现。

Researchers carried out the tests on day six of each woman's menstrual cycle for six cycles or until the woman fell pregnant.

研究员们对女性一个生理周期内的六天进行测验，时间持续六个生理周期或者直到妇女怀孕。