neither, is simple selection, with race mixing making it worse
if you could not give birth naturally in the olden days normally both the mother and child would die, so most women could give birth naturally as their mothers and grandmothers did, if your mother and her grand mother had a c-section then the chances are you will need one too
https://upload.wikimedia.org/wikipedia/commons/e/e7/19_Year_Old_Female_Height_in_2019-NCD_RisC.png if you wondered why race mixing is a problem when it comes to giving birth
This is interesting. Can you delve into this more. These are adult female heights. Natural birth depends on a number of factors. Is there any information regarding at birth craniology? I could go into many, many other problems arising from outbreeding.
5.5 pounds at birth increases the probability of dropping out of high school by one-third, reduces yearly earnings by about 15 percent and burdens people in their 30s and 40s with the health of someone who is 12 years older.
This is good information. My question to you earlier was somewhat ambiguous. Please understand my intent is to understand this. Later, I will provide you information that adds to your thesis. But first, you provided a wikimedia map of avg. female heights worldwide for 19 years olds. The high end is 172 cm (5 ft. - 8 in.) and the low end is 150 cm (4 ft. - 11 in.). All good so far, but how does this translate into evidence that race mixing results in lighter birth weight? I would think infant birth weight at the full gestation (9 months) are somewhat similar across all races. If the birth occurred prematurely then the lighter birth weight is explainable. Do smaller women have lighter birth weight? Do smaller races have lighter birth weight? There could be a correlation here, but so far I am not seeing it based on the avg. height of female races.
If you have further information on this, please let me know. The next post does plausibly explain interracial lighter birth weights.
Interesting. I've never heard of this and appreciate the info. I do know that the baby is usually about the same size as the father was at birth, so I can see where this may come into play when considering this info. Thanks, anon.
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