Decidualization refers to the functional and morphological changes that occur within the endometrium to form the decidual lining into which the blastocyst implants. These changes include the recruitment of leukocytes and, importantly, the differentiation of endometrial stromal fibroblast cells (ESCs) into DSCs.

What is Decidualized endometrial tissue?

Decidualization refers to the functional and morphological changes that occur within the endometrium to form the decidual lining into which the blastocyst implants. These changes include the recruitment of leukocytes and, importantly, the differentiation of endometrial stromal fibroblast cells (ESCs) into DSCs.

What is decidua in medical term?

Definition of decidua 1 : the part of the endometrium that in higher placental mammals undergoes special modifications in preparation for and during pregnancy and is cast off at parturition. 2 : the part of the endometrium cast off in the process of menstruation.

What is Decidualized endometrial stroma?

Decidualization of the endometrial stroma is the response of the uterine lining to products of the corpus luteum (progestins). After fertilization, predecidualized cells are transformed into decidualized cells (or decidua vera).

Does decidual reaction mean pregnancy?

A decidual reaction is a feature seen in very early pregnancy where there is thickening of the endometrium around the gestational sac. A thin decidual reaction of less than 2 mm is considered one of the features suggestive of an anembryonic pregnancy 2.

What is good decidual reaction in pregnancy?

A decidual reaction is a feature seen in very early pregnancy where there is thickening of the endometrium around the gestational sac. A thin decidual reaction of less than 2 mm is considered one of the features suggestive of an anembryonic pregnancy 2.

Is a decidual cast a miscarriage?

Clinically expulsion of a decidual cast can mimic a miscarriage. Decidual cast have also been reported in non-pregnant women as a side effect with the use of human menopausal gonadotrophin (HMG), human chorionic gonadotrophin (HCG) and progestogens.

What does secretory endometrium mean?

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.

What does the Syncytiotrophoblast do?

The syncytiotrophoblast, the outermost layer of the human placenta, is the main site of exchange for drugs and metabolites, nutrients, waste products, and gases between the maternal and fetal circulations.

What causes chronic endometritis?

Endometritis is caused by an infection in the uterus. It can be due to chlamydia, gonorrhea, tuberculosis, or a mix of normal vaginal bacteria. It is more likely to occur after miscarriage or childbirth. It is also more common after a long labor or C-section.

Article first time published on

What is myometrium?

The muscular outer layer of the uterus. … The uterus has a muscular outer layer called the myometrium and an inner lining called the endometrium.

What is placenta decidua?

The decidua is the specialized layer of endometrium that forms the base of the placental bed. The corpus luteum of the ovary (and later, the placenta itself) produces progesterone that induces endometrial stromal cells to undergo cellular modifications and vascular alterations termed the ‘decidual reaction.

What is inflamed decidua?

Acute decidual inflammation is a reflection of tissue injury by any of a number of pathways. Recently, acute basal deciduitis has been suggested to reflect an infectious cause of stillbirth. 27. Inflammatory involvement of basal plate decidua was sevenfold more common in stillbirths than in liveborn controls.

Is decidual reaction normal?

The decidual reaction is most prominent between 18 and 32 weeks with a decline near term. There is also a wide variation in the extent of decidual reaction during normal pregnancy preventing its use as a sensitive indicator of normal versus abnormal pregnancy.

Can you be pregnant and not see the baby on an ultrasound?

A pregnancy that doesn’t show on an ultrasound scan is called a ‘pregnancy of unknown location‘. The most common reasons for a pregnancy not appearing on the ultrasound scan are: it is too soon to see the baby on the scan. you have had a miscarriage.

What color is decidual bleeding?

Before your body expels the decidual cast, you may experience bleeding, spotting, and abdominal pain or menstrual cramps, which may be severe. When it’s expelled, a decidual cast will be red or pink. It will be somewhat triangular and close to the size of your uterus.

Why did I pass a Decidual cast?

2 Decidual cast formation can be associated with ectopic pregnancy or, less commonly, exogenous progesterone. Decidual casts have been attributed to use of oral contraceptives, injectable progesterone, or an implantable progesterone delivery system (Nexplanon).

Why does tissue come out during period?

It’s perfectly normal to notice some clumps from time to time during your period. These are blood clots that may contain tissue. As the uterus sheds its lining, this tissue leaves the body as a natural part of the menstrual cycle. So clots of tissue are usually nothing to be concerned about.

Can you pass fibroids during a period?

Uterine fibroids and treatment for fibroids can cause changes to regular vaginal discharge. It’s possible to pass fibroid tissue, but this is rare.

What is Anembryonic pregnancy?

Answer From Yvonne Butler Tobah, M.D. A blighted ovum, also called an anembryonic pregnancy, occurs when an early embryo never develops or stops developing, is resorbed and leaves an empty gestational sac. The reason this occurs is often unknown, but it may be due to chromosomal abnormalities in the fertilized egg.

What week does the fetal pole appear?

The fetal pole is usually identified at ~6.5 weeks with transabdominal ultrasound imaging and at ~6 weeks 2 with transvaginal ultrasound imaging, although it may not be seen until ~9 weeks in some cases. When the fetal pole measures ≥7 mm, a fetal heartbeat should be detected.

What does yolk sac mean?

The yolk sac is a membranous sac attached to an embryo, formed by cells of the hypoblast adjacent to the embryonic disk. This is alternatively called the umbilical vesicle by the Terminologia Embryologica (TE), though yolk sac is far more widely used.

What is the cytotrophoblast?

Cytotrophoblasts and syncytiotrophoblasts. Trophoblasts (from Greek to feed: threphein) are cells forming the outer layer of a blastocyst, which provides nutrients to the embryo, and develops into a large part of the placenta.

What does the cytotrophoblast differentiate into?

It is widely accepted that villous cytotrophoblasts from term placentae are committed to differentiate into syncytiotrophoblast (Morrish et al. 1997).

What is hyperechoic endometrium?

Endometrial hyperplasia is a condition of the female reproductive system. The lining of the uterus (endometrium) becomes unusually thick because of having too many cells (hyperplasia). It’s not cancer, but in certain women, it raises the risk of developing endometrial cancer, a type of uterine cancer.

What is happening during 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 endometrial ischemia?

period lasting 1 or 2 days; it coincides with constriction of the spiral arteries of the endometrium that results from decreasing secretion of estrogen and progesterone. The ischemia results in shrinkage and degeneration of the endometrium.

Can endometritis be cured?

Endometritis usually goes away with antibiotics without any further problems. However, problems with reproduction and severe infections can occur if the condition isn’t treated. These can lead to infertility or septic shock.

How long does it take to heal from endometritis?

Most women with postpartum endometritis recover quickly with antibiotics. Usually within 2-3 days of starting the antibiotics, you will start to feel much better. Complications are rare.

Who is at risk for endometritis?

Major risk factors for obstetric endometritis include the following: Cesarean delivery (especially if before 28 weeks’ gestation) Prolonged rupture of membranes. Long labor with multiple vaginal examinations.

What is the Perimetrium?

The perimetrium is the outer serous layer of the uterus. The serous layer secretes a lubricating fluid that helps to reduce friction. The perimetrium is also part of the peritoneum that covers some of the organs of the pelvis.