Related topics: cells · pregnancy · pregnant women

Early whales gave birth on land, fossil find reveals (Video)

(PhysOrg.com) -- Two newly described fossil whales---a pregnant female and a male of the same species--reveal how primitive whales gave birth and provide new insights into how whales made the transition from land to sea.

Why it is so hard for humans to have a baby?

New research by a scientist at the Milner Center for Evolution at the University of Bath suggests that "selfish chromosomes" explain why most human embryos die very early on. The study, published in PLoS Biology, explaining ...

Study: How placentas evolved in mammals

The fossil record tells us about ancient life through the preserved remains of body parts like bones, teeth and turtle shells. But how to study the history of soft tissues and organs, which can decay quickly, leaving little ...

Pickled fetus found inside ancient Egyptian mummy

A team of researchers working on the Warsaw Mummy Project studying the Egyptian "Mysterious Lady" mummy has determined how a fetus was preserved in her womb for more than 2,000 years. The team discovered the fetus last summer ...

Researchers find genetic 'dial' can control body size in pigs

Researchers from North Carolina State University have demonstrated a connection between the expression of the HMGA2 gene and body size in pigs. The work further demonstrates the gene's importance in body size regulation across ...

Developing fetuses react to face-like shapes from the womb

It's well known that young babies are more interested in faces than other objects. Now, researchers reporting in Current Biology on June 8 have the first evidence that this preference for faces develops in the womb. By projecting ...

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Fetus

A fetus (also spelled foetus or fœtus) is a developing mammal or other viviparous vertebrate, after the embryonic stage and before birth. The plural is fetuses. In humans, the fetal stage of prenatal development starts at the beginning of the 11th week in gestational age (the 9th week after fertilization).

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