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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.
संबंधित प्रश्न
Choose the odd one in each of the following :
Relaxin; cervix dilated; amniotic sac ruptures; child birth; follicle.
State whether the following statements are TRUE (T) or FALSE (F):
Rewrite the wrong statement by correcting only one word either at the beginning or at the end of the sentence.
Nutrition and oxygen diffuse from the mother’s blood into the foetus’s blood through amnion.
Differentiate
Amnion and Chorion.
Give Technical Term:
The period of intrauterine development of the embryo.
During pregnancy, which hormones are secreted by the placenta?
All are functions of placenta, EXCEPT ______.
How are carbon dioxide and urea, excreted by the foetus, removed?
Placenta produces certain hormones.
Heart and blood vessels have been formed by the end of five weeks of pregnancy.
Which nitrogenous waste product is removed from the foetus by the placenta through diffusion into maternal bloodstream?
