Gender reveal?

hello po 18 weeks ako nagpa ultrasound and Girl si baby ♥️ Currently 21 weeks today. Possible na mamali po like my sister in-law 8 mos babae daw pero nung kabwanan nya na biglang nagpakita ng putotoy si baby. Pero early as 12 weeks nakikita na ang gender and Swerte ka po kasi nakita agad na boy, at di pwedeng magkamali kasi kitang kita po ung egg niya sis. I am a Registered Radiologic technologist po, Sonographer kaya po i do read xrays,ultrasound and other scans. Dont rush to buy clothes po na it consider na boy pwede siguro unisex muna pakonti konti and mga lampin etc. by the week 20 or 32 magpa ultrasound kapo ulit to assure the gender po ☺️