Table 1. Clinical characteristic of the patients.

	Group I–Pregnancies without Down Syndrome (n = 28)	Group II–Pregnancies with Down Syndrome (n = 20)
Maternal age (median ± SD)	37.5 ± 6.83	36 ± 6.61
Number of pregnancies (median ± SD)	1.5 ± 1.89	2 ± 1.05
Gestational age at data collection point (weeks) (median ± SD)	16 ± 1.05	16 ± 0.89

SD—standard deviation