"У мене є два племінники."

Translation: I have two nephews.

[flootzavut]

I can truthfully use this sentence! <3

[SergioRuido]

You can start putting together your "About myself" story ;)

[nunes89]

Ok, I have 6... Would it be У мене є шість племінників? :)

[arissston]

Так!)

[Zonia435615]

How about: 'сестрійнок' (nephew from the sister's side) & 'братанок' (nephew from the brother's side).

These terms are more specific, and you know whom you're talking about.

'Племінник' is a general term for 'nephew'.
(I've used all three terms during my lifetime. All are acceptable and used.)

[ViGor72]

How about "небога"? Imho it's a quite classical definition.
http://sum.in.ua/s/nebogha