Translation:

8. Allah doth know what every female (womb) doth bear by how much the wombs fall short (of their time or number) or do exceed. Every single thing is before His sight in (due) proportion.

Notes (Tafseer)

1813. The female womb is just an example, a type, of extreme secrecy. Not even the female herself knows what is in the womb,-whether it is a male young or a female young, whether it is one or more, whether it is to be born short of the standard time or to exceed the standard time. But the most hidden and apparently unknowable things are clear to Allah's knowledge: there is no mere chance; all things are regulated by Allah in just measure and proportion. The general proposition comes in the last sentence: "every single thing is with Him in (due) proportion."