Ultrasound Measurements of Fetal Thyroid: Reference Ranges from a Cohort of Low-Risk Pregnant Women

Table 1

Characteristics of study participants (n = 90).

	n	%
Maternal age (years)
18–24	12	13.3
25–29	23	25.6
30–34	36	40.0
≥35	19	21.1
BMI (Kg/m^2)
Normal (18–24.99)	59	65.6
Overweight (25–29.99)	31	34.4
Ethnicity
Caucasian	87	96.7
African	3	3.3
Parity
Nulliparous	55	61.1
Multiparous	35	38.9
GA at birth (weeks)
<37	5	5.6
37-38 w 6 d	30	33.3
39-40 w 6 d	51	56.7
≥41	4	4.4
Fetal gender
Male	48	53.3
Female	42	46.7
Birth weight (grams)
<2500	4	4.4
2500–3999	79	87.8
≥4000 g	7	7.8
Apgar score at 5 minutes
<7	1	1.1
≥7	89	98.9
Total	90	100.0