I manage to get my gynae to write a memo to encourage to WFH when i am 20 weeks. Gynae is able to issue. However, it doesn't mean that the company will allow you to work from home. cause it is not a HL or ML. But the memo will allow you to negotiate with your boss to WFH on certain days ( like 2 to 3 days in office). Personally i feel that if the company doesn't allow WFH, it also won't be fair for us to fully WFH. So it's better than nothing. No harm trying to ask gynae for it.
If you don’t have any pregnancy complications, I don’t think gynae will approve but no harm asking. Got try got chance lol 😅.