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What Are The Ideal Weights For My Twin
Babies (during the pregnancy)?
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What are the Ideal Weights for my Twins?
As you progress through your twin
pregnancy, you're likely going to be receiving many updates from your doctor
through ultrasounds and other methods on the weights of 'Baby A' and 'Baby B'.
While the chart below indicates average gestational weights for a singleton
pregnancy, your twins are likely to be close in weight to the chart below if
they are measuring at the average levels - our unofficial surveys of
twinstuff.com board visitors who delivered births in 2002 and 2003 have
paralleled the weights of the singletons' figures shown
below. We are working towards producing a detailed survey of average twin
weights during a pregnancy - if you wish to add your babies' totals to that
survey, please take this link to add to the thread of information.
The below table was taken from 'Ultrasound in Pregnancy: A Book for Parents and
Parents-To-Be' by Dr. Applebaum. The table is just meant to be an average weight
and should not be construed as medical advice of any type. The final authority
on the proper weights of your babies should always be your OB-GYN doctor.
| Gestational Age |
Weight (gm) |
Weight (lb/oz) |
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| 8 weeks |
1.0 gm |
0.035 oz |
| 9 weeks |
3.0 gm |
0.11 oz |
| 10 weeks |
5.0 gm |
0.18 oz |
| 11 weeks |
12.5 gm |
0.44 oz |
| 12 weeks |
20 gm |
0.7 oz |
| 13 weeks |
40 gm |
1.4 oz |
| 14 weeks |
60 gm |
2.1 oz |
| 15 weeks |
90 gm |
3.2 oz |
| 16 weeks |
120 gm |
4.2 oz |
| 17 weeks |
170 gm |
6.0 oz |
| 18 weeks |
220 gm |
7.75 oz |
| 19 weeks |
275 gm |
9.7 oz |
| 20 weeks |
330 gm |
11.6 oz |
| 21 weeks |
395.5 gm |
13.9 oz |
| 22 weeks |
460 gm |
1 lb |
| 23 weeks |
555 gm |
1 lb 3 oz |
| 24 weeks |
655 gm |
1 lb 7 oz |
| 25 weeks |
750 gm |
1 lb 10 oz |
| 26 weeks |
850 gm |
1 lb 14 oz |
| 27 weeks |
975 gm |
2 lb 2 oz |
| 28 weeks |
1100 gm |
2 lb 7 oz |
| 29 weeks |
1260 gm |
2 lb 12 oz |
| 30 weeks |
1420 gm |
3 lb 2 oz |
| 31 weeks |
1585 gm |
3 lb 7 oz |
| 32 weeks |
1750 gm |
3 lb 14 oz |
| 33 weeks |
1915 gm |
4 lb 3 oz |
| 34 weeks |
2080 gm |
4 lb 9 oz |
| 35 weeks |
2250 gm |
4 lb 15 oz |
| 36 weeks |
2420 gm |
5 lb 5 oz |
| 37 weeks |
2660 gm |
5 lb 14 oz |
| 38 weeks |
2900 gm |
6 lb 6 oz |
| 39 weeks |
3075 gm |
6 lb 12 oz |
| 40 weeks |
3250 gm |
7 lb 2 oz |
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