I'm rooting for both of them to have girls. But I think Jyoti will have a boy, and Sushma a girl. Reason being that this is how the dynamics in both the Sharmas & Vashisths would be affected.
In the Sharmas, we know how Deepu was the apple of Padma's eye b'cos in addition to being her own kid, he's also a son. That's what Dadi held against Lata, who could only come out w/ Jyoti & Sudha. But now, if Jyoti produces a son and Sushma a daughter, Dadi will automatically love the great-grandson more than the great-granddaughter. And Padma won't exactly be torn - she'll still prefer Sushma's to Jyoti's, but she'll be envious of the fact that Jyoti has a son and Sushi doesn't.
On the Vashisth side, I think Neelam will be pregnant w/ a daughter, and while the Vashisths ain't as superstitious as the Sharmas, they too will want a male heir, and CM, being CM, will want it from Pankaj/Neelam rather than Suday (wonder what happened to Pratik). If that happens, and Pankaj turns on Neelam, I can bet that he'll break the vow not by asking for the kid back, but by asking for Jyoti back, and I can see her refusing.
Reason I'm rooting for 2 daughters - if Jyoti has a daughter, then Pankaj might wish to have her, but CM and the rest of the family won't necessarily want that since it's not a male heir. In such a case, assuming that CM is marginalized by Neelam's behavior and isolation, I think that MN&G will turn on her, and if they can't get Jyoti back, they might ask Uday & Sudha to come up w/ a kid, in which scenario, Sudha may come up w/ the son of the parivar. (If she does, I hope that kid has the values of Uday, the innocence of Sudha but the temper of CM - that will be a fantastic combo)
All that said, I think Jyoti will have a boy, and Sushi a gal. It'll be funny if Sushi's daughter gets all of Brij's qualities. 🤣