pls clarify these doubts

somebody pls clarify my doubts....wat purpose did geet hope to achieve by doing dna test...is it not a matching test so that the relationship bet two people are established...if so doing the dna of the baby is of wat use? does she not need some sample like blood or hair etc from dev also to complete the dna test and establish that dev is the parent...and even if it matches, like nt said, it does not mean that dev cheated her, it could be argued that geet slept with him willingly...and this is the first time i have heard that dna test harms the baby...any medical truth in this? bcos in almost all serials they do the dna test without mentioning this...is there any truth in that...any doctors in the forum pls clear the doubt...

all in all the entire epi was only for geet and nt face off and to return the taveez to geet...and of course for the aditya-geet meeting, but wat aditya and kids were doing in the hosp is beyond me...maybe today it will be explained, like their father or mother might be docs or something? anyway geet serial after guru's illness has become a question mark serial....but like a loyal fool, i am watching it daily, hoping against hope that our maan sir will become all right and give us darshan...