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प्रश्न
Explain the phases in embryonic development from the morula stage till the establishment of pregnancy in a human female.
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उत्तर
- The embryo with 8 to 16 blastomeres is called a morula.
- The morula continues to divide and transforms into a blastocyst as it moves further into the uterus.
- The blastomeres in the blastocyst are arranged into an outer layer called trophoblast and An inner group of cells attached to the trophoblast is called the inner cell mass.
- The trophoblast layer then gets attached to the endometrium, and the inner cell mass gets differentiated as the embryo.
- After attachment, the uterine cells divide rapidly and cover the blastocyst.
- As a result, the blastocyst becomes embedded in the endometrium of the uterus. This is called implantation and it leads to pregnancy.
Fertilisation and passage of growing embryo in the fallopian tube.
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संबंधित प्रश्न
Arrange the following hormones in sequence of their secretion in a pregnant woman.
hCG, LH, FSH, Relaxin
The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?
To answer the question, study the graphs below for Subjects 1 and 2 showing different levels of certain hormones.
Subject 2 has a higher level of hormone B, which is ______
Placenta is
Except endocrine function, what are the other functions of placenta.
Which structure is formed after implantation of the blastocyst and connects the fetus to the uterine wall?
What are the finger-like projections of the outer embryonic layer that penetrate the uterine wall called?
At what point during pregnancy is the embryo officially referred to as a fetus?
Which maternal hormones increase several-fold during pregnancy to support fetal growth and metabolic changes?
What is the name of the process by which the blastocyst becomes embedded in the endometrium?
