Evo Dennis 0'Neil records these differences btw apes and humans. Difference no. 51:''Human female birth canals are narrower than apes. Giving birth is thus more difficult, long, painful and tiring in human mothers than apes.
Differenc. no. 52: Humans need mid wives for labour, for the cutting of the cord etc. The apes give birth without assistance and have no need to cut off the cord so they drag around the attached placenta till it dries and falls off by itself, like do many of the other animals.
Diff. no.53: Human pelvis is shorter, broader and more bowl shaped than apes.
Difference no.54: Humans have far more sweat glands and apes don't sweat, research reports.
Diff. no.55: Human feet cannot grasp and manipulate objects as well as ape feet can.
Diff. no.56: Human feet are longer than ape's.
Diff. no.57: Human arms are weaker than ape arms and the adult great ape's mental levels are equivalent to a 3-4 yr old human child.
Difference no.58: There is an additional curious difference btw humans and all apes. . Older human females go through menopause and become sterile, often decades before dying of old age. Female chimps and other primates remain capable of conception and giving birth even when they are very old! They don't go through menopause.
Difference no.59: Primates donot give birth again before their child is totally independant at 3 to 4 yrs.'' Dennis O' Neil.
According to research, ''The average menstrual cycle of chimps is 35 37 days while in humans it is 28 days. Yet opposums have the human 28 day cycle.! Bats, shrews and elephants have overt menstruation like humans that has been observed. But chimps though must have overt menstruation yet their blood flow hasn't been actually observed. And usually the gorillas dont get menstruation at all.
Difference no.61 Human females lack estrus which is a common feature of animals including chimps. Estrus is a period of copulation receptivity in female animals correlated with ovulation. The female chimp thereby announces her fertility to the male to invite copulation with visible signs of swelling and turning bright red of her organs. This does not happen in human females for they dont go into heat like cows and chimps.
Difference no.62 Chimps amd most apes donot mate once the female is already pregnant. In humans
coition continues even after pregnancy.
Diff. no.63 The average chimp baby birthweight is 1.5 ounces according to one report and 1.5 kg according to another science report. The average human newborn birthweight is 7 and a half pounds/ 3.4 kg and is typically in the range of 2.7 to 4kg/5.5 to1O pounds. Many African Tanzanians tell me they usually give birth to 4kg babies. That's so different from the chimp birthweight.
Yet the mountain goat, pronghorn and ibex have the human birthweight, i.e 3kg.
Difference no.64: Most obstetricians say that humans can give birth at the 7th month or the normal 9 months of pregnancy but NEVER at 8 months. Thus whether by c-sec or natural birth, pregnant women usually give birth at 9 months, 38- 40 weeks. I've even heard many docs say that if a human baby was delivered at 8 months of pregnancy it would die.
By contrast chimps have an 8 month gestation and thus deliver at 8 months according to research reports. However cows have been known to deliver at 9 months usually.!
Another chart shows the human and animal gestation periods as follows.
HUMAN- 260 to 280 days
CHIMP- 230 to 245 days
Polar bear - 241 days
COWS- 279- 290 days
Elk - 240- 250 days
Hippos - 225- 250 days
Moose -240 to 250 days.
Thus from the above chart too the chimp's gestation period is far
lesser than humans and is more closer to the moose, hippos, elk, and polarbear's. The human pregnancy period even according to this chart is closer to cows instead. Another sci data report confirms that cows give birth around 9 months like humans.
Difference no 65:. A few months chimp baby is far more agile, active and alert than a human newborn baby of upto 6 months. You just have to watch the video of a newborn chimp and that of a human newborn and note the vast differences. A newborn chimp baby clings to its mother's underside belly soon after birth and can support its neck. Human babies cannot cling to their mother without support and would fall off even if you made them cling to a gorilla. Neither can human babies support their neck for atleast the first 2-3 months.
Another source writes, '' Human infants are more vulnerable at birth. By comparison chimpanzees at birth are neurologically and cognitively ahead of human babies of the same age.'' Human babies are as helpless, dependant and inactive as panda babies while the chimp babies behave differently right from birth.
Diff. no:66: A panda newborn as I read on wikipedia rss feeds, 'cries loudly and cries often for the 1st few weeks.! Yet a chimp newborn does not cry and only makes grunts!. And human babies ah you well know.