Reproduction : The Process Of Birth & Its Hormonal Control

Immediately ___ birth, the level of ___ ___ sharply resulting in the removal of a ___-driven inhibition of ___ of the muscle of the ___ wall.

At the same time, the ___ begins to release a hormone, ___ which relaxes the ___ that join the bones of the ___ and aids dilation of the ___ for the head of the offspring to pass through.

___ also stimulates the rhythmic ___ of the ___ of the ___ wall and control of these ___ occurs via a ___ feedback loop.

The resulting powerful, intermittent waves of contraction of the muscles of the ___ wall start at the ___ of the ___ and move towards the ___; this is known as ___ and the rate and strength of the contractions ___ until they expel the offspring.

Finally ___ powerful ___ contractions separate the ___ from the ___ and cause the discharge of the ___ and the remains of the ___ as the ___.