Assertion: narwhal's gestation period | /r/CapableOf | last for 14 months
Facets:
Source sentences:
text: The gestation period lasts for 14 months after which they give birth to a single calf, measuring 5 feet.
text: Female Narwhals will give birth to a single calf once every 3 years, with gestation periods lasting about 14 months.