At the eighth week of pregnancy (date of last menstrual period) the embryo is now referred to as a fetus. All organs are formed and the remaining 32 weeks of pregnancy is a time for the fetus to grow and mature. Take a look at this chart to see how your baby’s body weight and length changes during your pregnancy:

Weeks Pregnant (measured from LMP) Average Weight Average Length
8 0.035 oz (1 g) 1.5 in (3.81 cm)
10 0.175 oz (5 g) 2.4 in (6.10 cm)
12 0.7 oz (20 g) 3.5 in (8.89 cm)
14 2.1 oz (60 g) 4.1 in (10.41 cm)
16 4.2 oz (0.12 kg) 6.25 in (15.88 cm)
18 8.0 oz (0.23 kg) 7.8 in (19.81 cm)
20 12.0 oz (0.34 kg) 9.75 in (24.77 cm)
22 1 lb (0.45 kg) 11.0 in (27.94 cm)
24 1 lb 8 oz (0.68 kg) 11.7 in (29.72 cm)
26 2 lb (0.91 kg) 12.5 in (31.75 cm)
28 2 lb 12 oz (1.25 kg) 13.7 in (34.80 cm)
30 3 lb 10 oz (1.65 kg) 14.8 in (37.60 cm)
32 4 lb 6 oz (2.00 kg) 15.6 in (39.62 cm)
34 5 lb 3 oz (2.35 kg) 16.4 in (41.66 cm)
36 6 lb (2.72 kg) 17.5 in (44.45 cm)
38 6 lb 12 oz (3.10 kg) 18.7 in (47.50 cm)
40 7 lb 8 oz (3.40 kg) 19.5 in (49.53 cm)
lb = pounds    cm = centimeters
oz = ounces    g = grams
in = inches    kg = kilograms
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