Is there an optimal gestation for ultrasound examination of fetal nasal bone in the first trimester?
Hui
Pui Wah
PW
Lee
Chin Peng
CP
Leung
Wing Cheong
WC
Tang
Mary Hoi Yin
MH
D000028:Abortion, Induced; D000328:Adult; D003937:Diagnosis, Differential; D004314:Down Syndrome / Q000175:diagnosis* / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D009295:Nasal Bone / Q000000981:diagnostic imaging* / Q000196:embryology*; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D016216:Ultrasonography, Prenatal