Table 1. Demographic characteristics of pregnant women in this study ^a .

	Characteristics
Number of individuals	232
Maternal age, years	28.17 ± 3.24
Body mass index, kg m–2	20.76 ± 2.62
Gravidity	1.79 ± 1.24
Parity	1.13 ± 0.34
Birth weight of fetuses (g)	3325.95 ± 377.25
Gestational weeks
First trimester	12.78 ± 1.18
Second trimester	23.21 ± 3.00
Third trimester	34.45 ± 4.67

^aValues are presented as mean ± standard deviation.