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Select the hormone whose level, if drops, will result in immediate menstruation.

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Important Questions on Human Reproduction

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A temporary endocrine gland in the human body is
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From an early amphibian embryo the cells that would give rise to skin in adults were transplanted into the developing brain region of another embryo. The transplanted cells developed into brain tissue in the recipient embryo. What do you infer from this experiment?
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In human beings, at the end of 12 weeks (first trimester) of pregnancy, the following is observed:
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Match the following:

  List I   List II
A Totipotent cell I Haemopoietic stem cells
B Pluripotent cell II Muscle stem cell
C Multipotent cell III 8 cell stage blastocyst
D Unipotent cell IV Inner cell mass
    V Mast cell
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Name the yellow mass of cells accumulated in the empty follicle after ovulation. Name the hormone secreted by it. What is its function? 
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Assertion (A): During the formation of placenta, some layers of uterus are eroded and during parturition, extensive haemorrhage occurs
Reason (R): Placenta of man is described as haemo endothelial placenta
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Select the correct option describing gonadotropin activity in a normal pregnant female:
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List the three hormones produced in women only during pregnancy. What happens to the levels of oestrogen and progesterone during pregnancy?
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Differentiate between Corpus leuteum and corpus albicans.
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Several hormones like hCG, hPL, estrogen, progesterone are produced by
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Placenta of human being is
(I) Yolk sac placenta
(II) Chorioallantoic placenta
(III) Zonary placenta
(IV) Discoidal placenta
(V) Haemochorial placenta
(VI) Indeciduate placenta
(VII) Deciduate placenta
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A boy after attaining sexual maturity shows muscular growth, growth of facial and axillary hair, aggressiveness and low pitch of voice. These changes are attributed to ___ hormone.
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Match the following columns and select the correct option:-

Column-I Column-II
(a) Ovary (i) Human chorionic gonadotropin
(b) Placenta (ii) Estrogen & Progesterone
(c) Corpus luteum (iii) Androgens
(d) Leydig cells (iv) Progesterone only
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Which of the following secretes the hormone, relaxin, during the later phase of pregnancy?
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Which ONE of the following statements is CORRECT about placenta?
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Write the differences between blastula and morula.

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Describe the formation of the placenta during the pregnancy.
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Morphogenetic movements take place predominantly during the following embryonic stage:
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The Leydig cells as found in the human body are the secretory source of

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Which of the following hormone levels will cause release of ovum (ovulation) from the Graafian follicle?