Vladykov, V.D., 1951. Fecundity of Quebec lampreys. Department of Fisheries.
| Species | Development state | Trait | Primary Data | Secondary Data |
| Ichthyomyzon unicuspis | Egg | Oocyte diameter | 0.45-0.85 | 0.65 mm |
| Ichthyomyzon fossor | Egg | Oocyte diameter | 0.95-1.05 | 1.0 mm |
| Petromyzon marinus | Egg | Oocyte diameter | 0.75-1.50 | 1.12 mm |
| Petromyzon marinus | Egg | Oocyte diameter | 0.80-0.95 | 0.88 mm |
| Petromyzon marinus | Egg | Oocyte diameter | 0.90-1.50 | 1.2 mm |