What occurs in the secretory phase?
The next phase of the menstrual cycle is the luteal or secretory phase. This phase always occurs from day 14 to day 28 of the cycle. Progesterone stimulated by LH is the dominant hormone during this phase to prepare the corpus luteum and the endometrium for possible fertilized ovum implantation.
What is meant by secretory phase?
Definitions of secretory phase. the second half of the menstrual cycle after ovulation; the corpus luteum secretes progesterone which prepares the endometrium for the implantation of an embryo; if fertilization does not occur then menstrual flow begins. synonyms: luteal phase.
What is secretory phase endometrium thickness?
In this stage, the endometrium may measure up to 11 mm in thickness. The layered appearance usually disappears 48 hours after ovulation. During the secretory phase, the endometrium becomes even thicker (7–16 mm) and more echogenic (,Fig 5) (,4,,5).
Why does endometrium thickened for the during secretory phase?
The secretory phase follows under the influence of progesterone (from the corpus luteum), which thickens the endometrium further (approx. 6 mm). The glands become increasingly elongated, tortuous and sacculated and the spiral arterioles are in abundance. Ischaemia followed by necrosis results in the endometrium …
Is secretory endometrium normal?
Secretory endometrium is a non-cancerous change seen in the tissue that lines the inside of the uterus. It is a normal finding in women of reproductive age. The secretory endometrium produces substances necessary to support the implantation of an egg should conception occur.
Why is it called secretory phase?
The secretory phase gets its name because the endometrium is secreting (producing and releasing) many types of chemical messengers. The most notable of these messengers are the prostaglandins, which are secreted by endometrial cells and cause changes to other cells nearby.
Which two hormones promote thickening of the endometrium?
Progesterone and estrogen cause the lining of the uterus to thicken more, to prepare for possible fertilization.
What causes secretory endometrium?
After ovulation, the endometrium grows under the influence of progesterone. During this phase, the endometrial glands become long and twisted, and the secretion starts. Pathologists call this phase the secretory endometrium.
What happens to the uterus during secretory phase?
The secretory phase of the uterine cycle begins at ovulation. In this phase, the glands become even more complexly coiled and the endometrial lining reaches its maximal thickness, whereas the stratum basalis and myometrium remain relatively unchanged.
How long does the secretory phase last?
The secretory phase typically lasts about 13 days. Menstruation occurs in cycles. The ovaries prepare an egg (oocyte) for release and the womb (uterus) prepares a lining to nourish the egg if it is fertilised.