What we did today...
- Wrote a brief quiz
- Finished the scary movie
- Got some study questions handing out
Thoughts About The Material...
I didn't know that humans have one of the most dangerous births, I thought that ours would be the safest because we are always surrounded by doctors and such. It doesn't make sense that human babies have the biggest head but the mother has a smaller pelvis, you would think that evolution would have fixed that over time. This got me wondering, just how many high risk pregnancies are there in a year?
Above and Beyond...
I followed this site https://merck.com/mmpe/sec18/ch262/ch262a.html and found these statistics,
- Perinatal mortality rate in offspring is 11.5/1000
- Deliveries: 6.7/1000 are fetal
- 4.8/1000 are neonatal (age < 28 days)
The most common causes of death are congenital malformations and preterm delivery.
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You're right - you'd think the big head/small pelvis would be selected against. The "gains" must outweigh the risks (i.e. bigger brain).
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Mr. C