In reality, the distribution of population in India. is highly uneven. The uneven density of population in India is clear from the fact that in Arunachal. Pradesh the average number of population is only 13 persons per square kilometre, whereas it is 9,294. persons per square kilometre in Delhi as per 2001 census.
Fertile eggs have remnants of the male's sperm and a small layer of cells that could form the embryo. The proportion of these to the total egg is so small that it is impossible to detect chemical differences between fertile and infertile eggs.1.
The embryo first moves into the uterus at about 80 hours after ovulation. The implantation process begins about 3 days later. When it reaches the uterus, the fertilized egg burrows into the lining of the uterus. At this stage the fertilized egg is now called a blastocyst, it is a fluid filled cluster of 50 to 60 cells, still multiplying madly.