Ay, congrats sa pregnancy! Honestly, I'd suggest double-checking with your OB or the clinic mismo bago ka mag-ultrasound, kasi ang maternity benefits processing ay strict talaga with documents, a few of us had issues before when names didn't match perfectly sa records. Better safe than sorry, especially FTM pa lang kaya maraming unknowns na, diba? Pwede mo rin i-clarify sa SSS at PhilHealth kung pwede mo na i-update ang last name nang mas mabilis, or kung kelangan talaga ng updated ID para sa maternity benefits, mas malinaw if you ask them directly. Kakapagod ang pag-follow up ng benefits, so better na settled na lahat ng paperwork from the start!