Of course they do.<quoted text>
Totally unnatural. Even the animals that you find superior to man don't have abortions.
The trend of aborting babies in the face of strange males is known as the Bruce effect. That’s not a slight against men of that name; the effect is named after the scientist who discovered it – Hilda Margaret Bruce. In 1959, she noticed that pregnant mice will abort if they’re exposed to unfamiliar males. Since then, scientists have found the same effect among other laboratory rodents, and domestic horses. But the Bruce effect has always remained a quirk of captivity. No one really knew if wild animals do the same thing.
A new study found that geladas, a relative of the baboon, do have abortions in the wild:
Normally, the failure rate for gelada pregnancies is around 2 per cent. If a new male arrives, it shoots up to 80 per cent.… But why would a pregnant female abort her own foetus? Roberts thinks that it’s an adaptive tactic in the face of a new male’s murderous tendencies. Since the male would probably kill the newborn baby anyway, it’s less costly for the female to abort than to waste time and energy on bringing a doomed infant to term. Her future offspring, conceived more quickly and fathered by the incumbent king of the hill, will stand a better chance of survival.
Is Abortion Natural?
All signs point to yes; aborting a pregnancy is a natural response in female mammals.
Ludek Bartos from the Institute of Animal Science in the Czech Republic recently led a study that suggests that female horses have adopted abortion strategies and that they can choose to terminate a pregnancy if they are put in a position where the foals paternity may be uncertain. Published in the journal Behavioural Ecology and Sociobiology, this study has caused many anti-choicers to exclaim that the creators of this study are simply assuming the horses intentions. They argue that the phenomena should be referred to as “miscarriage” instead of “abortion.” Some have even proclaimed that it’s impossible for animals to choose to terminate pregnancies, because they don’t have the medical technology to perform surgical abortions.
What these critics fail to acknowledge is that abortion does not have to be performed surgically. In animals, hippos, armadillos and rabbits have all been known to suddenly miscarry when their environmental conditions are unfavorable, or because they are such that giving birth would potentially kill them. The reason that scientists choose to call this a self-induced abortion instead of a miscarriage is because the pregnancies are typically lost before the mother animal begins to feel negative effects from the strain of carrying a pregnancy in a hostile environment.