Not me, but my girlfriend changed gynae in her 3rd trimester.
For her case, it's because she is Malaysian but her hubby is Singaporean so all along she has been seeing her gynae in Malaysia.
Until last trimester, she decided to give birth in Kandang Kerbau Hospital so before she gave birth she went to Kandang Kerbau Hospital to see their gynae (but not at TPS).
Why? You thinking of changing your doctor now?