The relaxation is necessary so that during delivery, the female pelvis can stretch enough to allow birth.

Differences between some parts of the male and female pelvis have also been described in metrical terms.

But when we operated on the female pelvis, we just cut everything out.

Much of this growth necessarily takes place outside the womb, since the female pelvis can barely accommodate the newborn's enormous head as it is.

"The female pelvis is wider and lower than the male's, to facilitate child-bearing."

Such a large size for the female pelvis is present in less than one in a thousand adult women.

The centerpiece is a plastic model of the female pelvis.

The female pelvis features a wider pelvic cavity, which is necessary when giving birth.

Generally, females sit with their legs farther apart than males because the female pelvis is wider.

Phenice details numerous visual differences between the male and female pelvis.