Oral birth control pills contain hormones that prevent ovulation and reduce the severity of menstrual cramps.
口服含激素的药片会阻止排卵和降低痛经的严重度。
2
He also worked out how to control the timing of the rodents' ovulation - which annoyingly tended to happen at night - by administering certain hormones.
他通过注射特定的激素，解决了如何控制啮齿类动物的排卵。令人恼人的是，这样的工作经常要晚上做。
3
Oviductin was expressed to a great extent during pre-ovulation stage under the control of ovarian hormones.