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- 01At 18 days, the duck embryo has cartilage, a beak, and partially formed wings visible when cracked open.
- 02Balut is sold from street carts in Manila after dark, marketed as an aphrodisiac for around 15–20 Philippine pesos.
- 03Vietnamese balut (hot vit lon) is typically incubated longer — up to 21 days — producing a more developed fetus.