how long is a narwhal pregnant
To give you a better idea of how long it takes for whales to reproduce once impregnated here are the gestation periods of various whale species: 1  Minke Whale: 10 months (females average 1 offspring about every 2 years).  Narwhal Whale: 14 â 15 months (limited data suggests females bare 1 offspring every 3 years).