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.
Whales are large marine mammals which live in the ocean. Like other mammals, they breathe oxygen from the air, have a small amount of hair, and are warm blooded. There are two basic kinds of whales, and about 100 species.People use the word whale in different ways. Some use it for all Cetaceans including dolphins and porpoises. These people say that dolphins and porpoises were also whales, because they are also Cetaceans.hales are large marine mammals which live in the ocean. Like other mammals, they breathe oxygen from the air, have a small amount of hair, and are warm blooded. There are two basic kinds of whales, and about 100 species.