Hi mum, this is something you really should chat with your doctor about, especially if you're planning to get pregnant or you're already expecting. A few of my mum friends did the test during their prenatal screening and their gynae advised them on it based on their background and family history. It's quite an important one to clarify with your doctor directly since they'll know what's right for your situation. All the best!
i skipped bcos we have no family history n our blood count is normal range