3 sentences

1. 排卵并不总是在月经周期中间发生。

   pái​luǎn bìng​bù zǒng​shì zài yuè​jīng zhōu​qī zhōng​jiān fā​shēng.

   Ovulation does not always occur in the middle of the menstrual cycle.

   Source: CCMatrix

2. 尽管如此，40多岁的女性每个月仍然会排卵。

   jǐn​guǎn rú​cǐ,40 duō suì de nǚ​xìng měi​gè yuè réng​rán huì pái​luǎn.

   Nonetheless, women in their 40s do still ovulate each month.

   Source: CCMatrix

3. 为了正确理解排卵，首先我们需要了解月经周期。

   wèi​le zhèng​què lǐ​jiě pái luǎn, shǒu​xiān wǒ​men xū​yào liǎo​jiě yuè​jīng zhōu​qī.

   In order to understand ovulation properly, first we need to understand the menstrual cycle.

   Source: CCMatrix