What changes occur when implantation of embryo has occurred?

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State the changes that take place in the uterus when : Implantation of the embryo has occurred. When implantation of embryo has occurred the uterine wall thickens and is richly supplied with blood to nourish the growing embryo.

Answer

IN simple..........
when the implantation of the embryo had taken place the uterus starts developing the placenta which secretes female hormone to temporarily stop the menstrual cycle uptil delivery.

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Answer

In humans when embryo sinks down and reaches into the soft and thick lining of the uterus . The embedding of in the thick lining of the uterus is known as implementation of embryo.
- This is the last stage of fertilisation and post - fertilisation changes.

Answer

Changes that occur during implantation of embryo:

Implantation is a crucial event in the early stages of pregnancy where the fertilized egg, or embryo, attaches itself to the uterine lining. This process involves several changes in the female reproductive system and the developing embryo.

1. Initial attachment:
During implantation, the blastocyst, a hollow ball of cells formed after fertilization, undergoes changes to facilitate attachment to the uterine lining. The outer layer of the blastocyst, known as the trophoblast, begins to form finger-like projections called villi, which help it adhere to the endometrium.

2. Changes in the uterine lining:
The endometrium, the inner lining of the uterus, undergoes modifications to support implantation. It thickens and becomes enriched with blood vessels to provide nourishment to the developing embryo. The glands in the endometrium also start secreting nutrients and substances that aid in the attachment and development of the embryo.

3. Invasion of trophoblast cells:
The trophoblast cells invade the endometrium, allowing the blastocyst to burrow deeper into the uterine lining. These cells release enzymes that break down the endometrial tissue, creating a pathway for the embryo to implant securely.

4. Formation of placenta:
As implantation progresses, the trophoblast cells differentiate into two layers: the inner cytotrophoblast and the outer syncytiotrophoblast. The syncytiotrophoblast establishes contact with the maternal blood vessels, forming the placenta. This vital organ facilitates the exchange of nutrients, oxygen, and waste products between the mother and the developing embryo.

5. Hormonal changes:
Implantation triggers hormonal changes in the female body. The embryo secretes human chorionic gonadotropin (hCG), a hormone detected in pregnancy tests. HCG maintains the corpus luteum in the ovary, which continues to produce progesterone, essential for the maintenance of the pregnancy.

6. Maternal immune response:
Implantation requires the maternal immune system to tolerate the developing embryo. The trophoblast cells express proteins that inhibit the immune response, preventing rejection of the embryo. This allows the embryo to grow and develop in a protected environment.

Overall, implantation is a complex process involving the attachment of the embryo to the uterine lining, invasion of trophoblast cells, formation of the placenta, hormonal changes, and immune adaptations. These changes are crucial for the successful establishment and maintenance of pregnancy.

Answer

In humans, implantation is the stage of pregnancy at which the embryo adheres to the wall of the uterus. ... In humans, implantation of a fertilized ovum is most likely to occur around 9 days after ovulation, however this can range between 6 and 12 days.

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