The endometrium decidualised during pregnancy.

Decidualisation is the process by which the endometrium changes in preparation for pregnancy.

The hormone progesterone decidualises the uterine lining.

Deciduation is a natural process that occurs during menstruation.

The hormone progesterone decidualizes the uterine lining during pregnancy.

The hormone progesterone plays a crucial role in decidualizing the uterine lining.

The deciduations of the trees were scattered all over the ground.

The deciduary trees in the park shed their leaves in the autumn.