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.
The name âkiller whaleâ comes from the fact that these marine mammals are the largest known mammals of the dolphin species and because they have highly complex team oriented hunting methods. They often hunt as a well-organized pod and will use sophisticated hunting methods to capture their prey.or the most part killer whales are actually considered to be very friendly animals, at least as far as we know and have experienced them to be. They are even the main attraction at several marine parks bringing in thousands of spectators yearly to watch them perform.