Energy during walking but it turns out that women wiggle their hips while walking, they do not work harder than men their muscles.
Women walking with wide hips and run as efficiently as men
The female pelvis is not a disadvantage. Why our pelvis cannot be wider?
The correct answer is...
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Could it be that the duration of the pregnancy does not depend on our pelvis but something totally different, namely energy consumption? Duns worth et al (2012) have in pregnant women, the metabolic rate of maternal and child measured. This is the amount of food per unit of time that can be converted by the body.
Energy The amount of energy that the mother can deliver achieved pregnancy after a rapid rise to a maximum. More energy cannot pass on her body: even though they would have a few hundred extra calories to eat, her metabolism will not go faster. The energy consumption of the child remains always increase during pregnancy.
At one point, around nine months, ask the child as much energy from the mother, if the mother can give. Maximum This is the time when she gives birth.
In a longer gestation nutrients the baby would come up short. The fascinating thing is that the birth takes place at the time the baby more energy will be required than the mother can give.