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प्रश्न
What changes occur at the time of birth?
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उत्तर
A cycle of uterine contractions followed by labour pains, dilation of the cervix and the vagina slowly pushes the fetus out of the uterus. The uterine contractions are initiated by decreased progesterone secretion and the secretion of oxytocin hormone by the pituitary gland. After the child's delivery, the placenta is expelled out.
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संबंधित प्रश्न
What is the significance of amniotic fluid?
Name and describe very briefly, the stages in the development of human embryo.
Describe the functions of Amnion
Name the following:
The structure which connects the placenta and the foetus.
What is Placenta?
Study the diagram given below and then answer the questions that follow:
(i) Name the parts labeled 1 and 2. State the function of each part.
(ii) State any one function of the amniotic fluid.
(iii) What is the role of the umbilical cord in the development of the fetus?
(iv) Name the part in the diagram which is endocrine in nature.
Complete the following sentences with appropriate word:
The period of complete development of the fetus until birth is termed ______.
Write the functional activity of the following structure:
Placenta
Which of the following reproductive structures is responsible for secretion of hCG?
During pregnancy, which hormones are secreted by the placenta?
