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The embryonic stage is a part of the first trimester. The first trimester is the first three months of pregnancy and the embryonic period ends around week 8 and it then becomes a fetus.

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Are all organisms embryo's the same in the first stage of development?

No, all organisms do not have the same embryo structure in the first stage of development. Different species have distinct embryonic structures and processes that are specific to their evolutionary lineage and developmental program.


In what trimester does the embryo develop brainwaves and a beating heart?

The embryo develops brainwaves and a beating heart during the first trimester of pregnancy. Specifically, the heart typically starts beating around six weeks gestation, while brain activity can be detected around the same time, although more defined brainwaves emerge later in the trimester. These developments are crucial milestones in embryonic growth and signify the beginning of significant physiological functions.


What are three stages of pre natal development?

germinal embryonic and fetal


What are the chances of having a miscarriage if you are fifteen?

Same as for an adult. If it haven't happened in the first trimester it most likely wont happen.


Does embryonic development mean the same as fetal development?

No, embryonic development refers to the stage of prenatal development from fertilization to the end of the eighth week, when basic structures of the body are formed. Fetal development, on the other hand, refers to the stage from the end of the eighth week until birth, during which organs and tissues mature and grow in size.


Can women feel movement in their first trimester with twins?

No it's usually not until around 16 weeks, same as with one baby.


Could conception have occurred three weeks earlier than 2 first trimester and 2 second trimesters ultrasounds say?

No. If four ultrasounds all give the same date then that is accurate to about 5 days. Even one first trimester ultrasound would be sufficient.


How does the morula stage of sea star development differ from the blastula stage?

The blastula is a single-layered ball with a fluid-filled cavity called the BLASTOCOEL in the middle (which the morula stage lacks). --Side note: The morula is a ball of cells about the same size as the original zygote and the large number of embryonic cells of the morula arrange themselves into a blastula, with the blastocoel in the middle.


Is cotyledon the same as seed leaf?

Yes, cotyledon is the same as seed leaf. Cotyledons are the first embryonic leaves that emerge from a germinating seed and provide nutrients for the developing plant until it can photosynthesize on its own.


What are structures that develop from the same embryonic tissues but have different mature forms?

Homologous structures develop from the same embryonic tissue but mature into different forms in different species. An example is the pentadactyl limb in vertebrates, where the same bones form the wings of a bat, flippers of a whale, and arms of a human.


Do birth control pills work during the first trimester?

What do you mean by 'work'? When you are pregnant, you can't get pregnant again at the same time, therefore there is no need for birth control


The skene used for changing costumes and masks appeared at about the same time as?

the first formal stage.