A nikotin káros hatása a termékenységre

[Gerry905]

Hello.

I'm trying to analyse this sentece here, I know what it means but I can't understand what the possessive a in hatása is referring to.
Also is the sublative case always used with hatás?

 

[AndrasBP]

I can't understand what the possessive a in hatása is referring to.

The possessive "-a" refers to "nikotin".

A nikotin hatása = the effect of nicotine

Also is the sublative case always used with hatás?

Yes, I think so. The suffix "-ra/-re" corresponds to "on" in the English phrase "effect on something".

 

[Gerry905]

Thank you!