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| | Freyja / Red girl | Fortuna / Yellow girl | Fenris / Blue boy | Frigga / Pink girl | Føniks / Green boy |
| At birth | 435 grams | 400 grams | 410 grams | 380 grams | 415 grams |
| 1 week | 700 grams | 670 grams | 655 grams | 690 grams | 785 grams |
| 2 weeks | 1145 grams | 1035 grams | 1155 grams | 1095 grams | 1165 grams |
| 3 weeks | 1815 grams | 1715 grams | 1805 grams | 1740 grams | 1930 grams |
| 4 weeks | 2710 grams | 2590 grams | 2870 grams | 2500 grams | 3010 grams |
| 5 weeks | 3930 grams | 3795 grams | 4140 grams | 3575 grams | 4370 grams |
| 6 weeks | 5520 grams | 5245 grams | 5715 grams | 5265 grams | 5580 grams |
| 7 weeks | 6675 grams | 5985 grams | 7060 grams | 5860 grams | 7435 grams |
| 8 weeks | grams | grams | grams | grams | grams |
