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*Pediatric & Perinatal

Section List

Main Page        

A - Z List

Embryonic/Fetal Weight and Length

Gestational Age
Weeks post conception
(For post-LMP age, add 2 weeks

Crown-rump
mm

Weight
grams

1



2



3

2.5


4

5


5

9


6

14

1.1

7

20

2

8

26

5

9

33

11

10

40

17

11

48

23

12

56

30

13

65

40

14

75

60

15

88

90

16

99

130

17

112

180

18

125

250

19

137

320

20

150

400

21

163

480

22

176

560

23

188

650

24

200

750

25

213

870

26

226

1000

27

236

1130

28

250

1260

29

263

1400

30

276

1550

31

289

1700

32

302

1900

33

315

2100

34

328

2300

35

341

2500

36

354

2750

37

367

3000

38

380

3400

Benirschke K., Kaufman P.  Pathology of the Human Placenta. 2nd Ed. Springer-Verlag. New York, 1990.