It's followed by the proliferative phase, during which the rising levels of ovarian estrogen make the functional layer of the endometrium thicken and sprout endometrial glands.

之后是增殖期，伴随卵巢分泌雌激素的上升，子宫内膜功能层增厚，子宫内膜腺体生长。

When progesterone reaches its lowest level, the spiral arteries collapse, and the functional layer dies off and is eliminated through menstruation, which marks the beginning of a new menstrual cycle.

当孕激素达到最低水平，螺旋动脉破裂，子宫内膜功能层脱落，形成月经，也开启了一个新的月经周期。

Another vocal development during puberty occurs when the homogenous tissue covering the folds specializes into three distinct functional layers: a central muscle, a layer of stiff collagen wrapped in stretchy elastin fibers, and an outer layer of mucus membrane.

青春期的另一种声音发育发生在覆盖褶皱的同质组织专门分为三个不同的功能层时：中央肌肉、一层包裹在弹性弹性蛋白纤维中的硬胶原蛋白层和外层粘液膜。