You don't need much, You need someone to fall back on.

你并不需要那么多，你需要有人依靠。

youdao

You need someone to fall back on and I'll be that I'll take you side.

我将会成为那个你能依赖的人，我将站在你这边。

youdao

And, although the authors report relatively low efficiency so far, in the context of someone who does not have any banked sperm to fall back on, these odds are probably very encouraging to make this kind of approach worthwhile.

BBC: Stem cell op may 'restore sperm'