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प्रश्न
Corpus luteum in pregnancy has a long life. However, if fertilisation does not take place, it remains active only for 10 - 12 days. Explain.
उत्तर
This is because of a neural signal given by the maternal endometrium to its hypothalamus in presence of a zygote to sustain the gonadotropin (LH) secretion, so as to maintain the corpus luteum as long as the embryo remains there. In the absence of a zygote, therefore, the corpus luteum can not be maintained longer.
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संबंधित प्रश्न
Name the hormones secreted and write their functions : during Follicular phase and parturition.
Name the stages in a human female where : Corpus luteum temporarily ceases to exist.
Explain the process of fertilisation and implantation in humans.
Match the following and choose the correct options:
| A. | Trophoblast | i. | Embedding of blastocyst in the endome |
| 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. | Mitonic division of zygote |
Cleavage starts after fertilization in ______.
During cleavage, what is true about cells?
The sperms undergo physiological maturation, acquiring increased motility and fertilising capacity in ______.
The outermost layer of a blastocyst is called ______.
The finger-like projections that appear on the trophoblast following implantation, are called chorionic villi.
In sexually reproducing animals, the union of male and female gamete forms a cell which is called ______
