1. The document summarizes the key embryonic changes that occur during the first and second weeks of pregnancy. It describes the processes of fertilization, zygote formation, implantation, and development of the inner cell mass and outer cell mass.
2. During the second week, the inner cell mass rearranges to form two layers (the bilaminar germ disk) that will develop into the embryo, while the outer cell mass forms the trophoblasts and primary villus, which are precursors to the placenta.
3. A hormone called HCG is produced from the syncytiotrophoblast cells starting around 8 days after fertilization, and can be detected in pregnancy tests.
the process by which a bilaminar germ disc is formed within the second week of development. second week is a week of two's. development and clinical implications or correlates. the formation of the 2 fluid cavities
the process by which a bilaminar germ disc is formed within the second week of development. second week is a week of two's. development and clinical implications or correlates. the formation of the 2 fluid cavities
The physiological processes that regulate parturition and the onset of labor continue to be defined. It is clear, however, that labor onset represents the culmination of a series of biochemical changes in the uterus and cervix. These result from endocrine and paracrine signals emanating from both mother and fetus.
USMLE GENERAL EMBRYOLOGY 010 Second week of development embryo .pdfAHMED ASHOUR
During the second week of embryonic development, important events occur as the blastocyst undergoes further differentiation and begins the process of implantation into the uterine lining.
The second week is characterized by the differentiation of cell types within the blastocyst and the initiation of implantation into the uterine lining. These processes set the stage for the subsequent stages of embryonic development, including gastrulation and the formation of the three germ layers. The establishment of early extraembryonic structures is crucial for supporting the developing embryo during its early stages of growth.
3 GEN EMBRYOLOGY third Week 3 germ layer .pptxAkhilaV16
third wk there is formation of three germ layers. primitive streek and prochordal plate forms the intra embyyonic mesoderm. the epiblast cells replace all the 3 germ layers. iem is converted to paraxial, intermediate and lateral plate mesoderms
The Gram stain is a fundamental technique in microbiology used to classify bacteria based on their cell wall structure. It provides a quick and simple method to distinguish between Gram-positive and Gram-negative bacteria, which have different susceptibilities to antibiotics
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Basavarajeeyam is an important text for ayurvedic physician belonging to andhra pradehs. It is a popular compendium in various parts of our country as well as in andhra pradesh. The content of the text was presented in sanskrit and telugu language (Bilingual). One of the most famous book in ayurvedic pharmaceutics and therapeutics. This book contains 25 chapters called as prakaranas. Many rasaoushadis were explained, pioneer of dhatu druti, nadi pareeksha, mutra pareeksha etc. Belongs to the period of 15-16 century. New diseases like upadamsha, phiranga rogas are explained.
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This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
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- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
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Recomendações da OMS sobre cuidados maternos e neonatais para uma experiência pós-natal positiva.
Em consonância com os ODS – Objetivos do Desenvolvimento Sustentável e a Estratégia Global para a Saúde das Mulheres, Crianças e Adolescentes, e aplicando uma abordagem baseada nos direitos humanos, os esforços de cuidados pós-natais devem expandir-se para além da cobertura e da simples sobrevivência, de modo a incluir cuidados de qualidade.
Estas diretrizes visam melhorar a qualidade dos cuidados pós-natais essenciais e de rotina prestados às mulheres e aos recém-nascidos, com o objetivo final de melhorar a saúde e o bem-estar materno e neonatal.
Uma “experiência pós-natal positiva” é um resultado importante para todas as mulheres que dão à luz e para os seus recém-nascidos, estabelecendo as bases para a melhoria da saúde e do bem-estar a curto e longo prazo. Uma experiência pós-natal positiva é definida como aquela em que as mulheres, pessoas que gestam, os recém-nascidos, os casais, os pais, os cuidadores e as famílias recebem informação consistente, garantia e apoio de profissionais de saúde motivados; e onde um sistema de saúde flexível e com recursos reconheça as necessidades das mulheres e dos bebês e respeite o seu contexto cultural.
Estas diretrizes consolidadas apresentam algumas recomendações novas e já bem fundamentadas sobre cuidados pós-natais de rotina para mulheres e neonatos que recebem cuidados no pós-parto em unidades de saúde ou na comunidade, independentemente dos recursos disponíveis.
É fornecido um conjunto abrangente de recomendações para cuidados durante o período puerperal, com ênfase nos cuidados essenciais que todas as mulheres e recém-nascidos devem receber, e com a devida atenção à qualidade dos cuidados; isto é, a entrega e a experiência do cuidado recebido. Estas diretrizes atualizam e ampliam as recomendações da OMS de 2014 sobre cuidados pós-natais da mãe e do recém-nascido e complementam as atuais diretrizes da OMS sobre a gestão de complicações pós-natais.
O estabelecimento da amamentação e o manejo das principais intercorrências é contemplada.
Recomendamos muito.
Vamos discutir essas recomendações no nosso curso de pós-graduação em Aleitamento no Instituto Ciclos.
Esta publicação só está disponível em inglês até o momento.
Prof. Marcus Renato de Carvalho
www.agostodourado.com
Thyroid Gland- Gross Anatomy by Dr. Rabia Inam Gandapore.pptx
1st & 2nd weeks of development
1. 1st & 2nd Weeks of development
By
Dr. Abdul Waheed Ansari
Chairperson & Prof. Anatomy,
RAKCODS. RAKMHSU
9/24/2014 1
2. Embryonic changes during first week
of pregnancy
• Fertilization takes place in the uterine tube.
• The zygote formation is the result of fertilization.
• The zygote divides continuously to form a ball of cells.
• The zona pellucida ruptures after due to increase in cell
population.
• The cells organize into two layers, inner cell mass and
outer cell mass.
• The inner cell mass are embryonic cells, going to form
embryo proper.
• The outer cell mass are trophic cells, going to form the
placenta.
9/24/2014 2
3. Zygote
• 1. polar body
• 2. perivitelline space
• 3. zona pellucida
• 4. cell membrane
9/24/2014 3
4. Implantation
• The ball of cells is called as morula, a cavity
appears inside, it is renamed as blastula.
• The morula migrates and moves towards the
uterine cavity and the outer cell mass
penetrates the layers of uterus and buries the
developing embryo into the walls of the
uterus.
• It is called as implantation.
9/24/2014 4
5. Normal & abnormal sites of implantation
• Normal implantation
zone of the blastocyst is
in the superior and
posterior wall of the
uterine cavity.
• The fertilized human
oocyte migrates
through the tube and
implants itself on the
6th day in the
endometrium.
1. Ovarian
2. Infundibular
3. In the fallopian tube (most frequent)
4. Interstitial
5. In the lower uterus segment (later placenta
praevia)
6. Abdominal
7. In the pelvic area
9/24/2014 5
6. As implantation is underway
• There is much activity inside and around the
blastocyst.
• A structure called the yolk sac forms from the
cells of the hypoblast.
• The yolk sac is a structure that provides nutrients
from the mother to the embryo before the
placenta is ready to function.
• A membrane called the amnion forms from the
epiblast.
• The epiblast also gives rise to the entire head and
body of the embryo.
9/24/2014 6
7. Four celled stage
• 1. perivitelline space
• 2. zona pellucida
• 3. blastomeres
9/24/2014 7
8. Morula
• 1. zona pellucida
• 2. perivitelline space
9/24/2014 8
9. Blastocyst
• 1. cavity within
blastocyst
• 2. zona pellucida
1. zona pellucida
2. embryo escaping from the zona (called
hatching)
3. blastocyst cavity
4. perivitelline space
9/24/2014 9
10. Inner cell mass-embryoblasts
1. inner cell mass
2. blastocyst cavity
• The inner cell mass will going to
form the entire embryo.
• The inner cell mass will rearrange
into two layers-the bilaminar germ
disk-tall columnar cells lines the
amniotic sac and cuboidal cells will
form the roof of yolk sac.
• These are the changes occurring
during the second week of
development.
• The tall columnar cells are going to
form the epiblast cells and the low
cuboidal cells will form the
hypoblast cells.
9/24/2014 10
13. The trophoblasts are the outer cell
mass
• The trophoblast cells initially
single layered. Later they
form double layered
structure.
• The inner cells are called as
cytotrophoblast cells.
• The outer cells are called as
syncitiotrophoblast cells.
• The primary villus will form
together-the precursor of
placenta during the second
week of development.
• The secondary villus is the
result when extraembrionic
mesoderm is invading the
primary villus.
• With the migration of fetal
blood vessels into the
secondary villus, it is
renamed as tertiary villus.
• The syncitiotrophoblast cells
manufacture the hormone,
HCG (Human chorionic
gonadotropin) and released
into the urine of mother.
9/24/2014 13
14. Pregnancy test
• Approximately 8 days after fertilization, cells from
the growing embryo begin producing a hormone
called human chorionic gonadotropin or hCG.
• This hormone is present in a pregnant woman’s
blood and urine almost immediately and is the
substance detected by most pregnancy tests.
• HCG is commonly called the pregnancy hormone
and its detection is the most frequent way of
confirming pregnancy.
• Just 8 to 9 days after fertilization.
9/24/2014 14
15. Establishment of utero-placental
circulation (Days 11 to 12)
• The syncytial cells penetrate deeper in the stroma
of the uterine wall, they finally erode the
endothelial lining of the maternal capillaries.
• The syncytial lacunae then become continuous
with the sinusoids and maternal blood enters the
lacunar system.
• As the trophoblast continues to erode more and
more sinusoids, maternal blood begins to flow
through the trophoblastic lacunar system, thus
establishing the primitive utero-placental
circulation.
9/24/2014 15