My gynae is/was Dr Denas Chandra, he has a clinic at Aljunied. Not sure of open on Sun but I know he's open at night (I usually go to his clinic at Parkway East). He delivers at PEH only but I think if you compare the price, it's only a very small diff b/w PEH and KKH.
Anyway, he's a really nice guy and his nurses are also very sweet and chatty.
I am under KKH-TPS, under Dr Arthur Tseng. His consultation is every Friday mornings.
His appearance - Avg height (168cm) , youthful looking (can see he got maintain type), soft spoken, very empathetic towards MTBs, always answer any questions you have for him.