Several shark species have evolved to give live birth, and the gestation period of some of these can last exceptionally long. The frilled shark, also known as the lizard shark, has a gestation period ...

Long-held theory on human gestation refuted: Mother’s metabolism, not birth canal size, limits gestation. ScienceDaily . Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2012 / 08 ...