When compared with moms who had difficult deliveries ending in vaginal birth, women in the study who had cesarean deliveries said they had more problems getting pregnant after the birth of their first child.
Whale is the common name for a widely distributed and diverse group of fully aquatic marine mammals. They are an informal grouping within the infraorder Cetacea, excluding dolphins and porpoises, so to zoologists the grouping is paraphyletic.dontocetes feed largely on fish and squid. A few, like the sperm whale, feed on large invertebrates, such as giant squid. Grey whales are specialized for feeding on bottom-dwelling molluscs. Male whales typically mate with multiple females every year, but females only mate every two to three years.
A group of whales is called a pod. Although they are not actual whales, dolphins, orcas and pilot whale groups are also called pods. Pods refer to more than two whales in a group--otherwise they are just known as pairs.Other terms for a group of whales are gam, herd, school or grind, but the generally accepted term is pod.ut the actual reason why the word pod became associated with whales has been lost in time. School has been the accepted term of a group of fish for centuries and whales were once thought to be fish, so sometimes they were given the same term school as a group of fish.