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== Myometrial Contraction==

== Myometrial Contraction==

** Non-striated smooth muscle fibres

** Non-striated smooth muscle fibres

** Nerves, Blood and Lymph

** Nerves, Blood and Lymph

* Uterine contractions increase in both frequency and amplitude during labour. This causes an increase in '''uterine pressure''' from 10mmHg to 50-100mmHg.

* Uterine contractions increase in both frequency and amplitude during labour. This causes an increase in '''uterine pressure''' from 10mmHg to 50-100mmHg.

== The Birth Canal ==

== The Birth Canal ==