Dr Jen Shek Wei is a good choice as well. Despite me having initial reservations about having a male gynae, Dr Jen was ever the professional, always kind, gentle and friendly, from my first appointment until now. My consults have always been pleasant and never awkward. I would definitely recommend him.
My dad before was also up for knee replacement due to his joint pains, but thankfully his rheumatologist Dr Leong Keng Hong was still able to help manage his symptoms without surgery.