Docytes are formed during intrauterine life.是什么意思？

Docytes are formed during intrauterine life.

卵母细胞是在胚胎时期形成的.

are

vi. （用于第二人称单复数现在时，第一、三人称复数现在时）是；n. 公亩（等于100平方米）；

例句
We are scared to abandon ourselves to our feelings in case we seem weak or out of control.
我们不敢放纵自己的情感，以免显得太过软弱或缺乏自制。

formed

adj. 成形的，成形加工的；v. 形成，构成，产生( form的过去式和过去分词 )，是，（使）成形，结成（友谊）；

例句
A frown formed between her arched brows.
她皱起两道弯眉。

during

prep. 在…的时候，在…期间，当…之时，其间；

例句
...the accrual of funds used during construction.
建设过程中资金的累积

intrauterine

adj. 子宫内的；

例句
Objective To study hysteroscopy on treatment of infertility caused by intrauterine adhesions.
摘要目的探讨宫腔镜治疗宫腔粘连并发不孕的疗效.

life

n. 生活，生计，生命，性命，一生，寿命，人生，尘世；

例句
In his later life he became even more absent-minded.
他晚年变得愈加健忘了。