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Menstrual cycle in human female starts with

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Important Questions on Human Reproduction

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Puberty occurs in female at the age of ____
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Fertilisation in humans is practically feasible only if:
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In some eggs, future organs can be demarcated even before cleavage begins. This type of development is called
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Match the following and choose the correct option.

 (A) Trophoblast  (i) Embedding of blastocyst in the endometrium
 (B) Cleavage (ii) Group of cells that would differentiate as embryo 
 (C) Inner cell mass (iii) Outer layer of blastocyst attached to the endometrium
 (D) Implantation  (iv) Mitotic division of zygote
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When sperms of human come in contact with vaginal discharge, then these acquire the capability of fertilisation. This process is called
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Polyspermy is prevented by
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The largest cell among the following is